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

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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(39659) About Me  (Show Source):
You can put this solution on YOUR website!
You want cosine%28theta%29?

cos%5E%28-1%29%28x%29 and cos%28x%29 are inverse functions. Now you know. Just follow what that means.

Answer by lwsshak3(11628) About Me  (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)