Question

CosQ cos(90-Q)-sinQ sin(90-Q)

Answer 1

Answer:

0

Step-by-step explanation:

CosQ cos(90 - Q) - sinQ sin(90 - Q)

using identity :-

cos(90 - theta) = sin theta and,

sin(90 - theta) = cos theta

CosQ sinQ - sinQ cosQ

= 0

hope this will help you