how do we find all solutions in that interval given. thanks
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Originally Posted by jvignacio how do we find all solutions in that interval given. thanks Hello JV, Cosine is negative in QII and QIII. Reference angle in QII = 180 - 60 = 120 degrees or radians Reference angle in QIII = 180 + 60 = 240 degrees or radians In radians: over the interval In degrees: over the interval
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