Question

Check all that apply. cotθ is undefined for θ = _____.

A. 3π/2

B. π/2

C. 0

D. π

Answer 1

cot = cosine over sine. So the cot will be undefined if the sine is 0. Is the sine of 3pi/2 equal to 0?

Answer 2

Is the sine of pi/2 equal to 0?
Is the sine of 0 equal to 0?
Is the sine of pi equal to 0?

Answer 3

well, cot is just cos/sin, so just find the sin and cos of each option and put it as sin/cos

ex. for option A: sin(3pi/2) = -1 cos(3pi/2)= 0. So, cot(3pi/2)=0/1. That equals 0, so obviously it's not a solution to the question. Now just do that for each option

Answer 4

I was actually in degree mode instead of radian mode. This all makes sense now thank you

Answer 5

lol no probs amigo