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Trigonometry 16 Online
OpenStudy (anonymous):

if sin theta =-4/5 and theta is in quadrant 4, the value of sec theta is

OpenStudy (noelgreco):

It always helps to draw the angle on the coordinate plane.

OpenStudy (noelgreco):

Or just draw any right triangle and label the sides so that the sine of one of the acute angles is -4/5.

OpenStudy (anonymous):

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