# If Cos(t)=-7/8 with #pi<=t<=3pi/2#, how do you find the value of sin(t/2)?

##### 1 Answer

Mar 24, 2016

#### Answer:

#### Explanation:

Apply the trig identity:

t is in Quadrant III, then, t/2 is in Quadrant II. Its sin is positive.

Therefor,

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