Question 949893
Find all values of t in the interval [0, 2π] that satisfy the given equation. (Enter your answers as a comma-separated list.)
 cos t = − square root 2 / 2
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The reference angle is pi/4
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The cos is negative in QII and QIII
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Ans:: x = 3pi/4 and 5pi/4
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Cheers,
Stan H.
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