Questions asked by Hayden L.

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How can I simplify sin2xcosx+cos2xsinx?
How can I determine the exact values for tan75?
How can I find c and d if $8 cos (θ - \frac{π}{3}) = c sin θ + d cos θ$ $8 cos (theta - pi / 3)=c sin theta + d cos theta$ ?
Is there a difference between a molecule and an atom?
How would you justify whether reactivity is a chemical or physical property?
How do you graph $y = cos (90 - A)$ $y = cos(90-A)$ as sinA?
How do I find the mass of copper(II) hydroxide which is formed when excess copper(II) sulfate is added to 100mL of a 0.450 mol $L^{- 1}$ $L^-1$ solution of sodium hydroxide?
The average of two numbers is 18. When 2 times the first number is added to 5 times the second number, the result is 120. How do I find the two numbers?
Petra is 4 times as old as Philippa. In 8 years time she will be 5 times as old as Philippa. How old are Philippa and Petra?
How many grams of KOH are needed to neutralise 500mL of 2mol $L^{- 1}$ $L^-1$ H2SO4?
At what point on the quadratic y= $x^{2}$ $x^2$ -4x-1 is the tangent parallel to the straight line y=-2x+5?
Without the use of the solve function of a calculator how do I solve the equation: $x^{4} - 5 x^{3} - x^{2} + 11 x - 30 = 0$ $x^4-5x^3-x^2+11x-30=0$ ?
How do I algebraically simplify this expression $\frac{\frac{x - 5}{2} - 1}{3}$ $((x-5)/2-1)/3$ ?
What is the domain and range of $\sqrt{\frac{5 x + 6}{2}}$ $sqrt((5x+6)/2)$ ?
How do you find the equations of the tangent and normal of the curve at $x = t^{2}$ $x=t^2$ , $y = t + 3$ $y=t+3$ , $t = 1$ $t=1$ ?
How do you find the derivative and double derivative of the equation $f (x) = x e^{- x^{2}}$ $f(x)=xe^(-x^2)$ ?
How do you find the equations of the tangents to $5 x^{2} - 4 y^{2} = 4$ $5x^2-4y^2=4$ at those points where the curve is cut by $5 x - 2 y = 4$ $5x-2y=4$ ?
How do you find the factors of $f (z)$ $f(z)$ over C if $f (z) = 2 z^{3} + 3 z^{2} - 14 z - 15$ $f(z)=2z^3+3z^2-14z-15$ ?
How do you express $\sqrt{2 + i}$ $sqrt(2+i)$ in polar form?
How do you factorize $- 9 z^{2} + 24 z - 32$ $-9z^2+24z-32$ over C?
How do you find the value of a if $2 i$ $2i$ is a root of $z^{3} - 2 z^{2} i + a z - 32 i = 0$ $z^3-2z^2i+az-32i=0$ ?
How do you use Demoivre's theorem to show that $sin 6 θ = sin 2 θ (3 - 4 {sin}^{2} θ) (1 - 4 {sin}^{2} θ)$ $sin6theta=sin2theta(3-4sin^2theta)(1-4sin^2theta)$ ?
How do you write the balanced half equation for the oxidation of methanal (formaldehyde), $C H_{2} O$ $CH_2O$ to $C O_{2}$ $CO_2$ ?
How do you simplify $\frac{sin a + tan a}{1 + cos a}$ $(sina+tana)/(1+cosa)$ ?
How do you simplify $\frac{tan x}{1 - tan x} + \frac{cos x}{sin x - cos x}$ $tanx/(1-tanx)+cosx/(sinx-cosx)$ ?