solve the equation if 0 degrees is greater than or equal to 0 greater than or equal to 360 degrees.
COS x = -1/2

Question

solve the equation if 0 degrees is greater than or equal to 0 greater than or equal to 360 degrees.
COS x = -1/2

jigglypuff314 · Answer

cos(x) = adjacent / hypotenuse
         = 1 / 2
which angle would make that true?
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anonymous · Answer

opposite?

jigglypuff314 · Answer

lol
look at it this way
then what angle would cos(x) be?
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anonymous · Answer

ohhhh 60 degrees?

jigglypuff314 · Answer

yep :)
but they want a negative 1/2
...
cos is positive in the first and fourth quadrants
and is negative in the second and third
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jigglypuff314 · Answer

soo... ummm... >.>
I've told you I'm not good at trigonometry >,<
so I might be wrong

x = (180-60)degrees  (cos(60) in the second quadrant)
and  x = (180+60)degrees  (cos(60) in the third quadrant)

anonymous · Answer

so what  is the answer lol

jigglypuff314 · Answer

x = (180-60)degrees
and  x = (180+60)degrees

hopefully you know how to add and subtract? :P

anonymous · Answer

240 and 140

jigglypuff314 · Answer

yup :)
(that's what I got, but idk if it's right :/ )

anonymous · Answer

well thanks lol

jigglypuff314 · Answer

glad I could help :)

anonymous · Answer

ok about to post the next ques :)