SOLUTION: Evaluate without using a calculator, use the fractions in the unit circle:
2sin^2 30° + cos210° + tan^2 315°
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-> SOLUTION: Evaluate without using a calculator, use the fractions in the unit circle:
2sin^2 30° + cos210° + tan^2 315°
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Question 506310: Evaluate without using a calculator, use the fractions in the unit circle:
2sin^2 30° + cos210° + tan^2 315° Answer by lwsshak3(11628) (Show Source):
You can put this solution on YOUR website! Evaluate without using a calculator, use the fractions in the unit circle:
2sin^2 30° + cos210° + tan^2 315°
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2sin^2 30°=2(1/2)^2=2*(1/4)=1/2 (quadrant I)
cos210°=-√3/2 (quadrant III)
tan^2 315°=(-1)^2=1 (quadrant IV)
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2sin^2 30° + cos210° + tan^2 315°
=1/2-√3/2+1
=-√3/2+3/2
=(-√3+3)/2 (ans)
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