SOLUTION: How do you find the exact value of cos(theta) when given: theta=cos^-1(3/7)

Question 894806: How do you find the exact value of cos(theta) when given: theta=cos^-1(3/7)
Found 2 solutions by josgarithmetic, lwsshak3:
Answer by josgarithmetic(39662) (Show Source): You can put this solution on YOUR website!
You want ?

and are inverse functions. Now you know. Just follow what that means.
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
How do you find the exact value of cos(theta) when given:
theta=cos^-1(3/7)
This reads: theta is the angle,whose cos=(3/7)
Therefore, cos theta=(3/7)

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