F I N D space T H E space V A L U E space O F space cos left parenthesis negative fraction numerator 5 straight pi over denominator 12 end fraction right parenthesis

Asked by Topperlearning User | 31st Aug, 2016, 09:36: PM

Expert Answer:

cos left parenthesis negative fraction numerator 5 straight pi over denominator 12 end fraction right parenthesis equals cos left parenthesis fraction numerator 5 straight pi over denominator 12 end fraction right parenthesis
fraction numerator 5 straight pi over denominator 12 end fraction equals 75 to the power of 0
cos left parenthesis 75 right parenthesis equals cos left parenthesis 45 plus 30 right parenthesis equals cos 45 cos 30 minus sin 45 sin 30
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Answered by  | 31st Aug, 2016, 11:36: PM