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In a right triangle with the hypotenuse being 21 and the opposite angle is 42 degrees, what is the sin 42?
 Oct 30, 2013

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The sine of 42 is always the same, regardless of the sides. Use a calculator unless you're really dedicated and want to actually learn how it's done, but you probably don't, judging from your question.
 Oct 30, 2013

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