Question

If sin a = 1/2 and cos B = then the value of (a + b) is​

Answer 1

Answer:

75°

sin A = 1/2

⇒ A = 30°

cos B = 1√2

⇒ B = 45°

Thus, A + B = (30° + 45°) =75°

hope it helps you ❣️❣️

Answer 2

Answer:

A+B = 90°

Explanation:

Given

i ) sinA = \frac{1}{2}

2

1

\implies SinA = sin30⟹SinA=sin30

Now ,

A = 30° ----(1)

ii ) cosB = \frac{1}{2}

2

1

\implies cosB = Cos60⟹cosB=Cos60

=> B = 60° ----(2)

Now,

Value of (A+B)

= 30°+60° [ from (1)&(2) ]

= 90°

Therefore,.

A+B = 90°