if sin 18 °=cosx° then x =
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18
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keerthi3821:
but it's wrong
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sin x = cos (90°-x) or cos (270°-x) or cos (450°-x)
thus sin 18° = cosx
=> then x = 72°,....
thus sin 18° = cosx
=> then x = 72°,....
mine is right??
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