Question

Identify cos^2 theta(1+tan^2 theta)=1. Start with the left-hand side.(Hint: There should be 3 step.)

Answer 1

Do you know any Pythagorean identity associated with \(1 + \tan^2 \theta\)?

Answer 2

\[\sec^2 \theta\] right?

Answer 3

That's right! What is \(\cos^2 \theta \times \sec^2 \theta\)?

Answer 4

0?

Answer 5

\[\cos^2\theta \times \dfrac{1}{\cos^2\theta}\]

Answer 6

I figured it out, but thank you for your help! :)