SOLUTION: What's the ExactValue for sin -285 degrees without using a calculator ?
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Question 577853
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What's the ExactValue for sin -285 degrees without using a calculator ?
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scott8148(6628)
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sin(-285º) = sin(75º) = sin(45º + 30º) = [sin(45º)][cos(30º)] + [cos(45º)][sin(30º)]
sin(-285º) = {[sqrt(2)] / 2}{[sqrt(3)] / 2} + {[sqrt(2)] / 2}{1 / 2}