SOLUTION: tan^2 x - sec x = -1

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Question 859788: tan^2 x - sec x = -1
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
For: [0,2π]
tan^2 x - sec x = -1
tan%5E2%28x%29-sec%28x%29=-1
sin%5E2%28x%29%2Fcos%5E2%28x%29-1%2Fcos%28x%29=-1
LCD:cos^2(x)
sin%5E2%28x%29-cos%28x%29=-cos%5E2%28x%29
1-cos%5E2%28x%29-cos%28x%29=-cos%5E2%28x%29
1-cos(x)=0
cos(x)=1
x=0, 2π