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Prove that tan(pi/10) is a root of polyn...

Prove that `tan(pi/10)` is a root of polynomial equation `5x^4-10 x^2+1=0.`

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CENGAGE ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
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  2. In an equilateral triangle, three coins of radii 1 unit each are kept ...

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  3. Prove that tan(pi/10) is a root of polynomial equation 5x^4-10 x^2+1=0...

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  5. Which of the following pieces of data does NOT uniquely determine an ...

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  12. tan100^0+tan125^0+tan100^0tan125^0 is equal to 0 (b) 1/2 (c) -1 (d) ...

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  14. Let A1,A2,....An be the vertices of an n-sided regular polygon such t...

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