SOLUTION: The point (-15/17,8/17) on the unit circle U corresponds to an angle of t. Find the exact values of the trigonometric functions at t.

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Question 960862: The point (-15/17,8/17) on the unit circle U corresponds to an angle of t. Find the exact values of the trigonometric functions at t.
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39620)   (Show Source): You can put this solution on YOUR website!
Second quadrant, so angle is between 90 and 180 degrees. Make use of reference to Unit Circle based on cosine 15/17 and sine 8/17; the tangent function might be a good choice:

gives the simpler angle but what you really want would be
.

Not sure here about "exact value", but you have something about .
Answer by MathTherapy(10553)   (Show Source): You can put this solution on YOUR website!

The point (-15/17,8/17) on the unit circle U corresponds to an angle of t. Find the exact values of the trigonometric functions at t. 
Be advised that ∠t is in the 2nd quadrant. Thus, the 6 trigonometric functions are:

1)         2)         3)  

4)         5)         6)  

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