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OpenStudy (anonymous):
For the given value of t determine the reference angle t' and the exact values of sin t and cos t. Do not use a calculator. t = −7π/4
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OpenStudy (anonymous):
sin(-7pi/4) = -(sin7 pi/4) isn't it like taking 7 leaps of 45 degrees which will end in the 4rth quadrant therefor sin(-7pi/4) =1 ??
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