Question

if sin a+b=1/2,cos a-b=1/ then the value of a is​

Answer 1

Answer:

a= 15

Step-by-step explanation:

sin(a+b) = 1/2

sin value at 30 is 1/2.

So,

sin(a+b)= sin30 degree

a+b=30...........equation(1)

cos(a-b) = 1

cos is 1 at 0 degree

so

cos(a-b) = cos (0)

a-b=0..............equation(2)

comparing (1) & (2)

2a= 30

a= 15 degree