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If tan alpha.tan2alpha = 1 then find the...

If `tan alpha.tan2alpha = 1` then find the value of `cos2alpha`.

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UNITED BOOK HOUSE-SUGGESSTION OR MADHYAMIK PARIKSHA-EXERCISE
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  3. If tan alpha.tan2alpha = 1 then find the value of cos2alpha.

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  4. If 0^@lethetale90^@ then show that sin theta+ cos theta>1.

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  12. Solve: (12x+17)/(3x+1)-(2x+15)/(x+7) = 3 1/5[x!= -1/3,-7]

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  13. The ratio of the roots of the quadratic equation ax^2+bx+c=0(a!=0) is ...

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  14. A man travelled 84 kms by cycle and observed that if he would be cycli...

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  15. If (a+b) alpha sqrt(ab), then show that (sqrta+sqrtb) alpha (sqrta-sqr...

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  20. If a,b,c,d are in continued proportion then show that bc(1/a+1/b+1/c+1...

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