Question

what is the value of cos(45°-A)-Cos(45°+A)​

Answer 1

cos(45-A)-Cos(45+A)=0

cos(45-A) = cos (45+A)

45-A=45+A

2A=90

A=45.

hope it helps.........

# Aniket ✌️

Answer 2

Answer:

Let (45+A) =x ,and (45-B) = y.

= sin x.cos y+cos x.sin y

= sin ( x+y) , on putting the values of x and y.

= sin(45+A+45-B)

= sin{ 90 +(A-B) }

= cos ( A - B )