Question

cos^2x (1+tan^2x)=1

Answer 1

\(\LARGE\color{blue}{ \cos^x(1+\tan^x)=1}\)

\(\LARGE\color{blue}{ \cos^x(1+\frac{\sin^2x}{\cos^2x})=1}\)

Answer 2

then apply, `sin²x+cos²x=1`

Answer 3

so it would turn to cos^x(sin^2x+cos^2x)=1

Answer 4

when you multiply cos²x times 1, you get cos²x.
When you multiply (sin²x / cos²x) × cos²x, what do you get ?

Answer 5

(btw- if you want to know how to type these symbols, I can share with you:) )

Answer 6

Wouldn't `cos²x` cancel ?

Answer 7

yes
im so lost in all of the trig stuff I don't even get my notes