An Angle R on the unit circle has a sine of 5/7 in quadrant 1. What is the cosine?

cos R = 2 root 6 / 7

Step-by-step explanation:

Given:

sin R = 5 / 7

To Find:

cos R = ?

Solution:

sin^2 R + cos^2 R = 1

(5 / 7)^2 + cos^2 R = 1

cos^2 R = 1 - 25 / 49

cos^2 R = 49 - 25 / 49

cos^2 R = 24 / 49

cos R = root 24 / 49

Therefore, cos R = 2 root 6 / 7

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Step-by-step explanation:

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y=mx+b

step-by-step explanation:

m slope

b y-intercept