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CBSE Class 10 Answered

trigonometry.
Asked by khushal305 | 29 Sep, 2009, 08:50: PM
Expert Answer

We have not understood the query that you have posted. We would request you to clarify whether it is cos square or cos 2
cos2 θ  - sin2 θ = tan2 Φ , prove that cos Φ =             1              .

                                                                                    2 cos θ

  so that we may answer this to the best of the ability.

Answered by | 25 Nov, 2009, 11:23: AM
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