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Find the quadrant in which cos theta is ...

Find the quadrant in which `cos theta` is negative and ` tantheta` is positive.

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cos theta. is positive in I and IV rants
.therefore cos theta. is negative in II and III rants Also tàn .theta. is positive in I and III rants.
.therefore. In the III rant .cos theta. is negative and .tan theta. - is positive
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