Question

PROVE THAT:
sin(90degree-A)cos(90degree-A)/tan A =1-sin^2 A​

Answer 1

Answer:

Step-by-step explanation:

sin (a - b) = sin a.cos b - sin b.cos a

sin (90 - a) = sin 90.cos a - sin a cos 90.

Since sin 90 = 1, and cos 90 = 0, therefor,

sin (90 - a) = cos a