SOLUTION: Please help me solve this problem. Please list the answers from all applicable quadrants. {{{ cos x = -sqrt(3)/2 }}}
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Question 1058898: Please help me solve this problem. Please list the answers from all applicable quadrants.
Found 2 solutions by ikleyn, josmiceli:
Answer by ikleyn(52785) (Show Source): You can put this solution on YOUR website!
.
x = = 150 degrees in QII, and
x = = 210 degrees in QIII.
You need to learn (to know) what is the trigonometric function cosine.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
The cosine function is negative in the
2nd and 3rd quadrants
------------------------
In the 2nd quadrant, the angle is
or degrees
----------------------------------------------
In the 3rd quadrant, the angle is:
or degrees
----------------------------------------------
So, and
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