sin18 sin 42 sin 78 cosex 54pls
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Answer:
sin18 sin(60-18) sin(60+18) cosec54
since sinx*sin(60-x)*sin(60+x) = 1/4 sinx
and cosec x = 1/sinx
= 1/4
hope it helps you.....!
sorry for the Delay in answering
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