SOLUTION: (1 pt) Solve the following equation in the interval [0, 2pi ]. Note: Give the answer as a multiple of pi . Do not use decimal numbers. The answer should be a fraction or an intege

Question 366937: (1 pt) Solve the following equation in the interval [0, 2pi ].
Note: Give the answer as a multiple of pi . Do not use decimal numbers. The answer should be a fraction or an integer. Note that pi is already included in the answer so you just have to enter the appropriate multiple. E.g. if the answer is pi/2 you should enter 1/2. If there is more than one answer enter them separated by commas.
2(cos(t))^2−cos(t)−1=0
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Do it like this one:
----------------
2sin^2 - sin - 1 = 0
Sub x for sin(t)
(2x + 1)*(x - 1) = 0
x = 1/2, 1
sin(t) = 1/2, 1
t = pi/6, t = pi/4 (principal values)

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