SOLUTION: Given that tanα=8/15 (180°<α<270°). Find Cos(α/2)
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Question 1112371: Given that tanα=8/15 (180°<α<270°). Find Cos(α/2)
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
is in III quadrant
use Pythagoras theorem
= hypotenuse =17
cos = 15/17
=
=
=
=
cos =
is in III quadrant so ....
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