SOLUTION: For each of the following, find all solutions. The variable n denotes a generic integer. 1)2 cos(x) + 1 = 0 2)(cos(x) - 1)(sin(x) + 1) = 0 3)sec2(x)

SOLUTION: For each of the following, find all solutions. The variable n denotes a generic integer. 1)2 cos(x) + 1 = 0 2)(cos(x) - 1)(sin(x) + 1) = 0 3)sec2(x) - 4 = 0

Question 948378: For each of the following, find all solutions. The variable n denotes a generic integer.
1)2 cos(x) + 1 = 0
2)(cos(x) - 1)(sin(x) + 1) = 0
3)sec2(x) - 4 = 0
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
For each of the following, find all solutions. The variable n denotes a generic integer.
1)2 cos(x) + 1 = 0
cos(x) = -1/2
x = (2/3)pi ; x = (4/3)pi
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2)(cos(x) - 1)(sin(x) + 1) = 0

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3)sec^2(x) - 4 = 0
(sec-2)(sec+2) = 0
sec(x) = 2 or sec(x) = -2
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x = pi/3 or (5/6)pi or x = (2/3)pi or (4/3)pi
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Cheers,
Stan H.
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