Question

help please...prove sin x/sec squared x-1=cosx cotx

Answer 1

Do you know your identities?

Answer 2

yes but im a little confuse how to begin

Answer 3

Can you clarify your equation, first? Use the Equation editor.

Answer 4

\[sinx/\sec ^{2}x-1=cosx cotx\]

Answer 5

Is that okay?

Answer 6

Is the 1 with sec^2x or is it separate?

Answer 7

Is it:
\[\LARGE \frac{sinx}{sec^2x}-1=cosxcotx\]
Or:
\[\LARGE \frac{sinx}{sec^2x-1}=cosxcotx\]

Answer 8

the second one

Answer 9

We can use the identity:
\[\LARGE tan^2(t) + 1 = sec^2(t)\]

Answer 10

So if we subtract the 1, we get:
\[\LARGE tan^2x=sec^2x-1\]
And we can sub that in instead

Answer 11

I got it thank you

Answer 12

Yup :)