Answers created by Nghi N

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• Solve cos x - sin x tan x + 1 = 0 for 0°≤x≤360° ? need the solution asap, thank you.
  
• How do I simplify the following trigonometric identity? Tan(x)/cot(x)
  
• How do you solve #tanxsinx-tanx=0# in the interval [0,360]?
  
• How to prove #sin^6x+cos^6x=1-3sin^2xcos^2x#?
  
• How do I simplify the following trigonometric identity? Csc(x) cot (x)/sec(x)
  
• How do you simplify #cos^4x-sin^4x#?
  
• The terminal side of #theta# in standard position contains (-8,-15), how do you find the exact values of the six trigonometric functions of #theta#?
  
• Find x where pi <= x <= 2pi? 4 cos^2 x - 2= sec^2 x - tan^2 x
  
• Find all angles a in the interval [0degrees, 360 degrees] such that sin^2a-sina =0?
  
• What is the value of cos sign if the reference angle is 13 pi/3?
  
• How do you solve: tanθ + secθ = 1 ?
  
• The maximum value of the function f(x)=(3cosx-2)^2-2 ?
  
• How do you prove that cos^4x-sin^4x=cos(2x) ?
  
• What is the formula of (1-cosx)/sinx ?
  
• How do you evaluate #tan^-1 (-sqrt3)# without a calculator?
  
• If #\sin x = \frac { 4} { 5]#, what is #sin 2x#?
  
• How do you solve #2sin^2x-5sinx-3 = 0#?
  
• Solve #tan2A=cot(A-18)# #0<theta<90# ?
  
• If cos A = -4/5 how do you find tan 2A?
  
• How do you find the value for #csc^-1 (-7/3) #?
  
• Solve sec x = 1.788, 0°<x<720° ?
  
• Write 3cosx-4sinx in the form k(sinx-β)?
  
• How do you solve #18cosx-9sqrt3=0#?
  
• How do you find the point (x,y) on the unit circle that corresponds to the real number #t=(5pi)/4#?
  
• Find the value ? #sin105^@ + cos105^@#
  
• What is the period of #f(t)=sin( ( t) /6 )#?
  
• How do you find sin if tan is 4?
  
• How do you find the radian measure of an angle of 280?
  
• How can i solve this equation: 2sen^2(t)-cos(t)-1=0 ?
  
• How do you solve this equation: csc^4 2(u)-4=0 ?
  
• Find #arcsin(-sqrt3/2)#?
  
• Suppose that β is an acute angle and sec β = 11 . 3. How to do the following?
  
• How do you solve #sin(2x-1)=sin(3x+1)# ?
  
• How do I solve for 0 <= x < 2pi? tan x - sec x +1 = 0
  
• Given the point (6,-8) on the terminal side of ø in standard position, find the exact value of csc ø?
  
• What is the period of #f(theta) = tan ( ( 12 theta)/7 )- sec ( ( 7 theta)/ 6 ) #?
  
• How do you use a calculator to evaluate #cos((8pi)/7)#?
  
• Given sinx=45 and cosx=35 . What is ratio for ​ tanx ​ ?
  
• How do you solve sin(x)-cos(x/3)=0?
  
• How does one find sin2x, cos2x, and tan2x if x is in quadrant IV and equals -2/#sqrt13#?
  
• 2cos^2x-sinx=-1?
  
• SOLVE to the nearest four decimals?
  
• SOLVE to the nearest four decimals?
  
• Given sin 30degree=1/2 and sin 45degree=1/squareroot2. Find the exact value of sin 75degree and cos 75degree?
  
• How do you answer this question?: Find the complete solution in radians: sin^2(θ) -1=cos^2(θ)
  
• Solve 2sinxcosx-sqrt2cosx=0 for 0 <=x<=360degree?
  
• Simplify completely: cos 75˚ cos 10˚ - sin 75˚ sin 10˚?
  
• Simplify completely: 1 – 2sin2 50˚?
  
• What are the six trig function values of # (5pi)/3#?
  
• How to find all solutions to the following equations in the interval 0 ≤ θ < 2π?
  
• Solve #cot (x/2) = sqrt(3)/3# ?
  
• How do you solve using the completing the square method #4x^2 + 4x + 1 = 49 #?
  
• What would a name of a binomial factor of: 26y^2-172y-70 be ?
  
• Solve the equation 2sin(2x-π/3)+1=0 on the domain -2π ≤ x ≤ 0?
  
• Find an angle between 0 and 2π that is coterminal with −9π/2? .
  
• Find all solutions for the following equations sin(2x)+sin(π/2-x)=0 ?
  
• Cos (1/2 x) = 3/4?
  
• Please could you explain how sin(x) + cos(x) = sqrt(2)sin(x+45)? I understand how you get sqrt(2) through sin(x)cos(45)+cos(x)sin(45). But I don’t. Understand how you end up with sin(x+45) or sin(x+π/4) depending on how you see it. Thanks a lot
  
• How do you factor #2(x^2) + 9x + 7#?
  
• Factorise #3x^2+2x-3# ?
  
• How do you solve multi step inequalities?
  
• Given the point #P(sqrt3/2,-1/2)#, how do you find #sintheta# and #costheta#?
  
• What is the period of #f(t)=sin( t /6 )+ cos( (7t)/24 ) #?
  
• CotA =5/12then sinA+cosa=?
  
• How to find the exact solutions which lie in [0, 2π) for cos(5x) = −cos(2x)?
  
• Let tan x = 2.4, sin y = 0.6, and both x and y be between 0° and 90°. Then cos(x + y) equals?
  
• What is #(cot2theta)/3# in terms of #tantheta#?
  
• How do you use a calculator to evaluate #sec225^circ#?
  
• Suppose α is an angle in standard position whose terminal side lies in Quadrant III. If tan α = 2 3 , find the value of sin α?
  
• How can simplfiy sin(x+5*pi) ?
  
• How do you find the exact value of #sin50cos25-cos50sin25# using the sum and difference, double angle or half angle formulas?
  
• What are the solutions to 10(sec^2)x+5(tan^2)x-15=0 over the interval (0,2pi)?
  
• How to find the general solution 5 sin(x)+2 cos(x)=3?
  
• Plz help me how unit circle works plz ?
  
• How do you solve and write the following in interval notation: #x^2-2x+4>0#?
  
• Where is the vertex in the parabola y = x^2 +2x - 5? i dont understand this i need x and y intercepts and please show work?
  
• X2 +14x-15=0 in this equation which add LHS as a perfect square 49. how this 49 will come... please tell about 49??? how this calculated
  
• Use the information about the angle θ to find the exact value of?
  
• How do you factor #6x^2-5x-25#?
  
• How can you solve for tan theta in tan (theta) + tan 3 (theta) /1 -tan (theta) *3 (theta) = -1 with your answer in a surd form?
  
• How do you evaluate #\frac { \sin ^ { 2} 15^ { \circ } + \sin 75^ { \circ } } { \cos ^ { 2} 36^ { \circ } + \cos ^ { 2} 54^ { \circ } }#?
  
• If cos theta =2/3,find theta where 180°<theta<360° What is the theta?
  
• How do I solve #cos x= (sqrt 2/2)# for #-2pi <=x<=2pi#?
  
• How do you solve and find the value of #cos^-1(1/2)#?
  
• What is #cos(arc sin (5/13))#?
  
• Use a double or half angle formula to determine value of cos(13π/12)?
  
• Solve 4sinx-cosx+3=0 ?
  
• How do you solve #3tanx+1=13#?
  
• If sina =-5÷13 and a lies in quadrant 3 then the value of cos (a÷2)?
  
• How do I solve the equation 90 cos X - 14 sin X = 72?
  
• How do you solve #5sin^2x-8sinx=3# in the interval [0,360]?
  
• How do you find the exact value of #cos^-1(1/2)#?
  
• Can anyone help in solving this problem? #14u^3-7u^3-8u+4#
  
• How do you find exact value of #sin (pi/ 6)#?
  
• What is the frequency of #f(theta)= sin 2 t - cos 5 t #?
  
• If x is an acute angle, and cos x =4/5, then cos (2 x) is equal to?
  
• How do you calculate #sin^-1(0.1)#?
  
• How do you sketch the angle whose terminal side in standard position passes through (0,3) and how do you find sin and cos?
  
• How do you simplify: cos^2x+cos^2(π/2-x) ?
  
• What are the solutions of 6 tanx sinx-6 tanx=0 in the interval ​[0,2pi]?
  
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