Question

Given that sina=1/2 and cosb=1/root2,then the value of an (a+b) is

Answer 1

Answer:

$\sin \: a = \frac{1}{2} ..........equation \: \: x\\ \cos \: b = \frac{1}{ \sqrt{2} } ............equation \: \: y \\ from \: equation \: x \: \: \: \sin (30) = \frac{1}{2} \\ from \: equation \: y \: \cos(45) = \frac{1}{ \sqrt{2} } \\ a = 30 \: \: \: \: \: and \: \: b = 45 \\ (a + b) = (30 + 45) = 75$

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