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OpenStudy (anonymous):
Write the trigonometric function values in terms of its cofunction sin(60degrees-x)
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OpenStudy (anonymous):
cos [90-(60-x)] = cos(90-60+x) = cos (30+x)
OpenStudy (anonymous):
Hello could you please tell me how does it become Cosine? and with equation like that?
OpenStudy (anonymous):
ok sin(90-A) = cosA cos(90-A) = sinA
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