How do you prove # 1 + tan^2x/(1-tan^2x) = 1/(cos^2x - sin^2x) #?

Related questions

• How do you use the fundamental trigonometric identities to determine the simplified form of the...
• How do you apply the fundamental identities to values of #theta# and show that they are true?
• How do you use the fundamental identities to prove other identities?
• What are even and odd functions?
• Is sine, cosine, tangent functions odd or even?
• How do you simplify #sec xcos (frac{\pi}{2} - x )#?
• If #csc z = \frac{17}{8}# and #cos z= - \frac{15}{17}#, then how do you find #cot z#?
• How do you simplify #\frac{\sin^4 \theta - \cos^4 \theta}{\sin^2 \theta - \cos^2 \theta} # using...
• How do you prove that tangent is an odd function?
• How do you prove that #sec(pi/3)tan(pi/3)=2sqrt(3)#?