Guest

if sin α + sin β = a and cos α + cos β = b , then the value of cos ( α + β ) is

if sinα+sinβ=a and cosα+cosβ=b, then the value of cos(α+β) is 

Grade:11

2 Answers

Prashant
29 Points
3 years ago
sin
Prashant
29 Points
3 years ago
what u have to do is name these equ as 1 and 2 now make squares of the equ and subtract themthen by simplying the obtained equ

Think You Can Provide A Better Answer ?

ASK QUESTION

Get your questions answered by the expert for free