Asked by Katie
How would you simplify and prove (csc x - cot x) = (1-cos x)/(1+cos x)? I've tried a lot of different starts, but I keep getting stuck.
Answers
Answered by
Reiny
One of the first things you should do when proving identities is to make sure they are true by taking any value of the angle.
I tried 45 degrees and
Left side = .707106 - 1 = -.2928...
right side = (1-.707)/(1+.707) = .17...
No wonder you could not "prove" it, the equation is not an identity.
I tried 45 degrees and
Left side = .707106 - 1 = -.2928...
right side = (1-.707)/(1+.707) = .17...
No wonder you could not "prove" it, the equation is not an identity.
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