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If cos Theta < 0, which quadrent(s) could the terminal side of Theta lie?
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If cos Theta < 0, which quadrent(s) could the terminal side of Theta lie?

User Kris Braun
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If cosΦ is lesser than zero (negative) it must be in quadrant 2 or 3 because cos is always positive in quadrants 1,4.
User Yhyrcanus
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