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Find the exact value of each trigonometric function:

1) cot 135 degrees
2) tan -30 degrees
3) cot (-pi)

Show your work.

This is from trigonometry or Algebra 2.
Please don't answer if you don't know it.

1 Answer

3 votes
cot 135 is the same a 1/tan 135, which is equal to 1/-1, so cot 135 is -1

tan -30 is the same as tan 330, which is -
√(3 ) / 3

cot -π = 1 / tan π, which is 1 / 0, and you can't divide by 0, so cot -π is undefined
User Wolfsshield
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