`(10pi)/3` Evaluate the sine, cosine and tangent of the angle without using a calculator.

1 Answer

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balajia | College Teacher | (Level 1) eNoter

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sin(10pi/3)=sin(3pi+pi/3)=-sinpi/3=-sqrt3/2

cos(10pi/3)=cos(3pi+pi/3)=-cospi/3=-1/2

tan(10pi/3)=tan(3pi+pi/3)=tanpi/3=sqrt3