SOLUTION: the exact value of cot 990 cant be a decimal answer and my teacher only taught us the decimal way how would i convert it?

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Question 740905: the exact value of cot 990 cant be a decimal answer and my teacher only taught us the decimal way how would i convert it?
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
Is the 990 in degrees or in radians?

Cotangent is cos%28alpha%29%2Fsin%28alpha%29 for some angle, alpha. If your 990 is degrees, then this is an angle at the same position as 270 degrees. The cotangent should be visually obvious. What is the cosine of 270 degrees? What is sine of 270 degrees?



Visual Help:
The lower endpoint needs an arrow-head, but this is the way 270 degree may be shown on the unit circle. See the dark segment from the origin to the point (0,-1):