# If #cotx= -3/4# and #90<x<180#, what is sinx?

##### 1 Answer

May 10, 2015

Use the trig identity:

Since 90 < x < 180, and x is in Quadrant II, then sin x is positive -> sin x = 0.8

May 10, 2015

Use the trig identity:

Since 90 < x < 180, and x is in Quadrant II, then sin x is positive -> sin x = 0.8

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