SOLUTION: sec^2 X = 2 / (1+cos^2 X)

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Question 987876: sec^2 X = 2 / (1+cos^2 X)
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
sec%5E2%28x%29=2%2F%281%2Bcos%5E2%28x%29%29
1%2Fcos%5E2%28x%29=2%2F%281%2Bcos%5E2%28x%29%29
2cos%5E2%28x%29=cos%5E2%28x%29%2B1
cos%5E2%28x%29=1
cos%28x%29=-1 or cos%28x%29=1.

x is any integer multiple of pi.