Question

Establish: 1-sin^2 theta/1+cos^2 theta=cos theta

Answer 1

Establish?

Answer 2

does it help to know what \(1-\sin^2(\theta)=\cos^2(\theta)\)?

Answer 3

You'll have to use parentheses so we can tell exactly what it is...

Answer 4

it is better, but it is false

Answer 5

I didn't solve it...supposedly the chapter is establishing trigonometric identities O.o

Answer 6

it would be like saying
\[\frac{5^2}{1+5^2}=5\] or
\[\frac{x^2}{1+x^2}=x\]

Answer 7

are you positive that is what it says? it is wrong for sure, but maybe it says something slightly different