Question

Sin(A+B).Sin(A-B)
In ΔΑΒC, Σ
CosACos2B
1) 0
2) 1
3) 2
4)1/2
​

Answer 1

Answer:

Sin(A+B).Sin(A-B)

In ΔΑΒC, Σ

CosACos2B

1) 0

2) 1

3) 2

4)1/2