Question

if sina=1/2 and cos b=1/2 then a+b=​

Answer 1

Answer:

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Answer 2

$\sin(a) = \frac{1}{2} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \cos(b) = \frac{1}{2}$

We know,

$\boxed{ \sin30 \degree = \frac{1}{2} } \\ \boxed{ \cos60\degree = \frac{1}{2} }$

So,

$\rm{}a = 30\degree \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: b = 60\degree$

Thus,

$\bf{}a + b = 30\degree + 60\degree \\ \tt= > a + b = \red{90 \degree}$