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07-04-2020
Mathematics

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PRECALC!!! The angle θ(1) is located in quadrant I, and sin(θ1)= 17/20. what is the value of cos(θ1)

PRECALC The angle θ1 is located in quadrant I and sinθ1 1720 what is the value of cosθ1 class=

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amna04352 amna04352

07-04-2020

Answer:

sqrt(111)/20

Step-by-step explanation:

cos²(theta) = 1 - sin²(theta)

= 1 - (17/20)²

cos²(theta) = 111/400

Since it's in the first quadrant, take the positive root

cos(theta) = sqrt(111)/20

sqrt: square root

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