Question 291277
 How do you solve trigonmetric functions without using a caluculator? Such as cot 495 degrees.
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It's not possible for all angles, unless you use series.
For some angles, tho, such as 495 degs:
Subtract 360 --> 135 degs
Plot it on a unit circle.  x is negative and y is positive, and are the same value.
cot = x/y = -1
tan(135) = -1 also