Question

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Answer 1

Your original question was a fraction but your reply is a matrix. Can it be assumed you want to simplify the fraction?

Answer 2

yeah sorry

Answer 3

\[\frac{ 1-\cos^2x }{ sinx }=\frac{ \sin^2x }{ sinx }=\sin x\]

Answer 4

Pythagorean identity:
\[\sin^2x+\cos^2x=1\]

Answer 5

Difference of 2 squares = sum x difference i.e.
\[(a^2-b^2)=(a+b)(a-b)\]

Answer 6

thanks!