Question

if sina = cos(a-26°) where 3a is acute angle find the value of a?​

Answer 1

ANSWER :-

$\sin \: a = \cos \: (a - 26) \\ \sin \: a = \sin(90 - a + 26) \\ = > \: a = 116 - a \\ 2a = 116 \\ a = \frac{116}{2} \\ a = 58$

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