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Proving trigonometric identities

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Attached are the problems that I can not find identities for.

1) (3sin^2x+sinx-4)/-cos^2x = (3sinx+4)/sinx+1

2) sin(x+pi) = -sinx

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Solution Summary

Solution describes the steps for proving given trignometric relations.

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Please see the attached file for the better clarity.

Solution:

1)

LHS

3sin^2x+sinx-4
------------------
-cos^2x

We know that sin^2x+cos^2x=1

So, ...

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  • BEng (Hons) , Birla Institute of Technology and Science, India
  • MSc (Hons) , Birla Institute of Technology and Science, India
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