Question

find the value Σ
sin (A + B) sin (A - B)
____________________
cos^2 A cos^2B
= 0
​

Answer 1

Answer:

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Answer 2

Answer:

find the value Σ

sin (A + B) sin (A - B)

____________________

cos^2 A cos^2B

= 0

Step-by-step explanation:

sorry i dont know ans.