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if tan (theta/2)=sqrt((1-e)/(1+e))tan (v...

if `tan (theta/2)=sqrt((1-e)/(1+e))``tan (varphi/2)`,then prove that `cos varphi=(costheta-e)/(I-ecostheta)`

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UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 10-EXERCISE
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  10. Prove that sqrt2 irrational, (use the method of contradiction).

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  13. if tan (theta/2)=sqrt((1-e)/(1+e))tan (varphi/2),then prove that cos v...

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  17. If the vertices of an equilateral traingle be represented by the compl...

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