Question

Which expression is equivalent to sin2(π2−x)/sinx?

Answer 1

A. –sin x

B. sin x cot x

C. cos x cot x

D. sin x tan x

Answer 2

well what you need to know is

\[\sin(\frac{\pi}{2} - x) = \cos(x)\]

and then you need to know

\[\sin^2(a) = 1 - \cos^2(a)\]

you need these 2 properties to get to solution

Answer 3

\[\frac{ \sin2(\pi^{2}-x) }{ sinx }\]

Answer 4

i think you right assuming half pi there, so it goes to cos*cos*1/sin---