tan (25 degrees) is positive and sin (-pi/2) is negative.
For cos (-2pi/5), remember cos (-2pi/5) = cos (2pi/5).
To calculate cot pi, cot x = 1/(tan x).
To calculate csc 0, csc x = 1/(sin x).
Determine whether the function value is positive, negative, zero or undefined.
tan 25 degree = my answer = positive?
cot Pi = how do you get this?
cos -2pi/5 = negative?
sin -pi/2 = negative?
csc 0 = how do you get this?
Also I have a issue with another part of the worksheet, it says determine the quadrant the pheta terminates...
how do i get this?
a couple of the problems are
1.) 6 radians
2.) cos pheta <0, sin pheta <0
how do you solve those?
The cos is positive because is in the fourth quadrant, where x is positive, and hence the cos is positive. Or you can use the identity I used, which is cos(-x) = cos x.
For the other two problems, I used identities again. Can you calculate and ?
Edit: the identities are and .