Question

using the formula,
$\cos(a)=\sqrt{ \frac{1 + \cos(2a) }{2} } find \: the \: value \: of \: \cos(30degree) given \: that \: \cos(60degree) = \: \frac{1}{2}$please help me


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Answer 1

Answer:

answer for the given problem is given

Answer 2

Answer:

√3/2 is the answer for your question