Question

cos (a+b)=0 and cos b=0 then a value​

Answer 1

Answer:

cos (a+b) = 0

cos b = 0

cos (a+b) = cos b

a + b = b

a = b - b

a = 0

therefore a = 0

Now, cos b = 0

and cos 90° = 0

therefore b = 90°

so a = 0° amd b = 90°