Question

if sinA=1/2 and cosB=1/2 then find the value of (A+B)

Answer 1

A = sin-1(1/2) = 30°
B= cos-1(1/2) = 60°
A+B = 30+60=90°it

Answer 2

Answer:

A+B = 90°

Explanation:

Given

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

$\implies SinA = sin30$

Now ,

A = 30° ----(1)

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

$\implies cosB = Cos60$

=> B = 60° ----(2)

Now,

Value of (A+B)

= 30°+60° [ from (1)&(2) ]

= 90°

Therefore,.

A+B = 90°

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