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OpenStudy (anonymous):
Given sin0 = 5/13 and cos0>0, find cos (2pi + 0(with slash)
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OpenStudy (anonymous):
Since cosx has a period of 2pi, asking for cos(2pi+x) is the same as asking for 2pi. We have a 5-12-13 triangle in this case. Create a triangle and find cosx which is adj/hyp
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