Question 833742
Given the angle, find the reference angle:
a. theta= 970
=70˚(in quadrant III)
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b. theta= -120
=60˚(in quadrant III)
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Calculate:
a. sin(13pi/6)
=sin(π/6)=1/2(in quadrant I)
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b. cos(-5pi/3)
=cos(2π/3)=1/2 (in quadrant I)
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c. tan(970˚)
=tan(70˚)≈-2.7475 (in quadrant III)
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d. csc(-120)
csc(60˚)=-2/√3=-2√3/2(in quadrant III)
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e. cot(-5pi/3)
=cot(2π/3)=1/√3=√3/3(in quadrant I)