Question

011. if cos(2A+B) = 1/2 and cos(2A - B)=v3/2, find the values of A and B.​

Answer 1

Step-by-step explanation:

A=22.5

B=15

2A+B=60 (cos 60=1/2)-(i)

2A-B=30 (cos30=√3/2)-(ii)

by adding both (i) and (ii) we get ,

4A=90

A=22.5°

applying value of A in equation ( i)

we get

B=15°

hope it helps