Barrett Alosa: Im trying to finish my homework but still can't understand exactly how to do it please help You are going to have to LEARN the UNIT CIRCLE- both degree measures and radian measures !!4π/3 radians = 240ºWhich Quadrant is that ? That tells you the SIGN (+ or -)What is the REFERENCE ANGLE ??tan (4π/3) = √3Come on...time to LEARN !!archimedes...Show more
Billie Bratchett: Note that π = 180 degrees,so 4π/3 = 240 degrees, = (180 + 60) degreessin 4π/3 =sin (π + π/3) = -sin (π/3) = -√3/2;and similarly for 180 deg shifts for the other functions(-1/2; -√3)...Show more
Oscar Wieland: 4π/3 = π + π/3sin(π + π/3) = -sin(π/3) = -(√3)/2cos(π + π/3) = -cos(π/3) = -1/2tan = sin/cos ==> √3
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