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Right Triangles and Trigonometry

SAT Math· difficulty 3/5

If sin⁡θ=0.6\sin\theta = 0.6 and θ\theta is acute, what is cos⁡θ\cos\theta?

  • A

    11

  • B

    0.50.5

  • C

    0.80.8

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  • D

    0.40.4

Explanation

cos⁡2θ=1−0.36=0.64\cos^2\theta=1-0.36=0.64, cos⁡θ=0.8\cos\theta=0.8.

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