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Prove that the measure of the angle betw...

Prove that the measure of the angle between two main diagonals of a cube is `cos^(-1)frac[1][3]`.

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The correct Answer is:
`cos^(-1)((1)/(3))`
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ARIHANT PUBLICATION-CHSE ODISHA EXAMINATION PAPER 2020 -GROUP B (ANSWER ANY THREE QUESTIONS)
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  9. What is the derivative of sec^(-1)(1/(2x^2-1)),with respect to(sqrt(1...

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  10. Find the approximate value of sqrt(48.96)

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  11. Solve : In((dy)/(dx)) = 3x+4y given that y=0, when x=0.

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  12. Evaluate the following integrals int(3sinx+28cosx)/(5sinx+6cosx)dx

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  13. Evaluate the following integrals : int(0)^(pi//2)log|(4+3sinx)/(4+3c...

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  14. The area between x=y^(2) and x=4 is divided into two equal parts by th...

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  15. Solve: xdy/dx+y=y^2ln x

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  16. Prove that the measure of the angle between two main diagonals of a cu...

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  17. Prove that the four points with position vectors 2veca+3vecb-vecc, vec...

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  18. If veca = 3hati+hatj-2hatk, vecb = 2hati-3hatj+4hatk then verify that ...

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