Question

Given that sin a= 1/2 and cos b = root 3/2.Find a+b

Answer 1

$\sin( \alpha ) = \frac{1}{2} = \sin(30)$
$= > \alpha = 30$
$\cos( \beta ) = \frac{ \sqrt{3} }{2} = \cos(30)$
$= > \beta = 30$
$\alpha + \beta = 30 + 30$
$\alpha + \beta = 60$
So, A+B =60°
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