Asked by Dog_Lover

Why doesn't cot^2 x + 1 = csc^2x work for 180 degrees in place of x?
Please help,I don't know why it doesn't work.
Thanks!

Answers

Answered by oobleck
because csc 180 and cot 180 undefined.
sin 180 = 0, so csc and cot are undefined there.
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