SOLUTION: Solve tan(x)cos(x)-cos(x)=0 for principal values of x. Express solutions in degrees

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Question 1033607: Solve tan(x)cos(x)-cos(x)=0 for principal values of x. Express solutions in degrees
Answer by Alan3354(69443) About Me  (Show Source):
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Solve tan(x)cos(x)-cos(x)=0 for principal values of x.
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tan(x)cos(x)-cos(x) = 0
cos*(tan - 1) = 0
cos = 0
x = 90 degs
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tan - 1 = 0
tan = 1
tan = 45 degs
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The x = 90 degs solution is not allowed, tan(90) is undefined.