Asked by Aqib
1-cos/1+cos= 2(cosec-cot)
Answers
Answered by
Steve
I presume you want to solve this equation for something. It would be easier if you actually wrote it with variables, coefficients, all that cool stuff.
Or is it just an identity you want to prove? If you want help, don't just toss trash over the transom.
Or is it just an identity you want to prove? If you want help, don't just toss trash over the transom.
Answered by
Steve
Ahh. an identity
(1-cos)/(1+cos) * (1-cos)/(1-cos)
= (1-cos)^2/(1-cos^2)
= (1 - 2cos + cos^2)/sin^2
= (1 - 2cos + 1 - sin^2)/sin^2
= ***
Hmmm. mistake?
Take x=π/4. Things don't match.
(1-cos)/(1+cos) * (1-cos)/(1-cos)
= (1-cos)^2/(1-cos^2)
= (1 - 2cos + cos^2)/sin^2
= (1 - 2cos + 1 - sin^2)/sin^2
= ***
Hmmm. mistake?
Take x=π/4. Things don't match.
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