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OpenStudy (anonymous):
what is the value of 2/3cos^3(PI)?
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OpenStudy (anonymous):
I think you might have meant cos^-1(2pi/3) : ) It's -1/2
OpenStudy (anonymous):
I could be wrong....
OpenStudy (anonymous):
Let me do more math...
OpenStudy (anonymous):
Sorry, I thought of the wrong thing... 2 pi/ three is the equivalent of 120 degrees. The reference angle is pi - 2 pi/3 = pi/ 3 or 60 deg. The value of cot is (cos/sin) and for the value of 2pi/3 is the square root of 3. Since it is in Quadrant II it is negative
OpenStudy (anonymous):
nope, its exactly what I typed :D
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OpenStudy (anonymous):
I done similur things, and i get em mixxed up...sorry, and yeah
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