Question

prove that, cos(90-theta).tan(90-theta)=costheta​

Answer 1

Step-by-step explanation:

L.h.s=cos(90-theta).tan(90-theta)

=sec(theta)*cot(theta)

=1/cos(theta)*cos(theta)/sin(theta)

=cosec (theta)=R.h.s

Answer 2

See the image
Hope it help you