SOLUTION: Determine cos θ to three decimal places when sin θ= 6/square root 61 and θ is an angle in second quadrant. thanks

Question 1165802: Determine cos θ to three decimal places when sin θ= 6/square root 61 and θ is an angle in second quadrant.

thanks
Answer by ikleyn(52873) (Show Source): You can put this solution on YOUR website!
.


You are given   = .


Then   = +/-  = +/-  = +/-  = +/-  = +/- .


Since    is in QII, the sign of the cosine is  " - ",  so the answer is  - .


Use your calculator.

Solved.

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