Question

If the cosine and tangent are both negative, the angle must be in quadrant -_____.
IV
I
II
III

Answers

mathhelper
Make a serious effort to look up and memorize the CAST rule

It says that the cosine is positive in quads I and IV, so it must
be negative in II and III
It says that the tangent is positive in I and III, so it must
be negative in II and IV

what quadrant is the common negative ratio?

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