Question

Please help!!!!!!!!!!!!! Use basic identities to simplify the expression. sin2θ + tan2θ + cos2θ

Answer 1

would the answer be \[\sec^2\theta \]

Answer 2

@Mertsj ?

Answer 3

\[\sin 2\theta +\frac{\sin 2\theta}{\cos 2\theta}+ \cos 2\theta=\]
\[2\sin \theta \cos \theta+\frac{2\sin \theta \cos \theta}{\cos ^2\theta-\sin ^2\theta}+\cos ^2\theta-\sin ^2\]

Answer 4

I guess I'm not seeing how you get sec^2 theta.

Answer 5

What happened to all the double angles?

Answer 6

i didnt mean sec i meant sin my bad

Answer 7

So you got this for the answer:
\[\sin ^2\theta \]

Answer 8

just sin theta

Answer 9

Could you post your work? I can't see how you got rid of sin(2theta) and tan(2theta) and cos(2theta) without using the double angle identities.

Answer 10

Oh gees. It just hit me...Did you mean sin^2 theta and cos^2 theta and tan^2 theta instead of sin(2theta)...

Answer 11

yes i did sorry i didnt clarify

Answer 12

@Mertsj

Answer 13

When you want to indicate an exponent use ^.
sec^2 theta is the correct answer.

Answer 14

oh okay thank you so much! I will always clarify from now on lol