Use basic identities to simplify the expression.

sin^2θ + tan^2θ + cos^2θ

sec^2θ
cos^3θ
sin θ
tan^2θ

Question

Use basic identities to simplify the expression.

sin^2θ + tan^2θ + cos^2θ

sec^2θ
 cos^3θ
 sin θ
 tan^2θ

anonymous · Answer

u know the double angle equations?

anonymous · Answer

wait, did u mean
$$\sin ^{2}\theta  + \tan ^{2} \theta + \cos^{3}\theta?$$

anonymous · Answer

yes!

anonymous · Answer

wait no that's wrong

anonymous · Answer

cos 2  thetha sorry, my typo...

anonymous · Answer

oh yeah then that's right again :O
sorry for the confusion!

anonymous · Answer

sin^2u + cos^2u = 1
and
1 + tan^2u = sec^2u

anonymous · Answer

$$using \cos 2x = \cos^{x} - \sin^{x},$$
$$\sin^{2}x = \cos^{2}x - \cos 2x$$

$$\tan ^{2}x = \frac{ \sin^{2}x }{ \cos^{2}x }$$

anonymous · Answer

oooh okay I got tan^2θ the first time I tried it and I wasn't sure if it was right! Thanks!