Guest

solve those questions.

solve those questions.

Question Image
Grade:12

1 Answers

Sourabh Singh IIT Patna
askIITians Faculty 2104 Points
8 years ago
Hii

For a) and f) Use Sin A + Sin B = 2 sin((A+B)/2)cos((A-B)/2)

For b) and c) Use CosA + Cos B = 2 cos((A+B)/2)cos((A-B)/2)


for d) Use Sin A - Sin B = 2sin((A-B)/2)cos((A+B)/2)

for e) Use CosA - Cos B = – 2sin((A+B)/2)sin((A-B)/2)


Thanks..

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free