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Find the derivative of y = cos^-1(1 − x)...

Find the derivative of `y = cos^-1(1 − x)`.

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Verified by Experts

The correct Answer is:
a

Given
`vecx xx vecy=veca` (i)
`vecy xx vecz=vecb` (ii)
`vecx.vecb =gamma` (iii)
`vecx.vecy=1` (iv)
`vecy .vecz=1` (v)
from (ii) , `vecx.(vecy xx vecz) =vecx . Vecb=gamma Rightarrow [vecx vecy vecz] = gamma`
From (i) and (ii) , `(vecx xx vecy) xx (vecy xx vecz) =veca xx vecb`
` [vecx vecy vecz]-[vecy vecy vecz] = veca xx vecb`
` or vecy = (veca xx vecb)/ gamma`
Also from (i), we get ` (vecx xx vecy) xx vecy =veca xx vecy `
` or (vecx.vecy) vecy- (vecy.vecy)vecx =veca xx vecy`
`or vecx = (1//|vecy|^(2))(vecy - veca xx vecy)`
`gamma^(2)/(|vecaxx vecb|^(2))[(vecaxxvecb)/gamma-(vecaxx(vecaxxvecb))/gamma]`
`gamma/(|veca xx vecb|^(2))[veca xx vecb-vecaxx (veca xx vecb)]`
Also from (ii) , `(vecy xx vecz)xxvecy = vecb xx vecy`
`or |vecy|^(2)vecz-(vecz.vecy)vecy= vecbxxvecy`
`or vecz= 1/(|vecy|^(2))[vecy+vecb xx vecy]`
`gamma/(|vecaxxvecb|^(2))[vecaxxvecb +vecb xx (veca xx vecb)]`
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CENGAGE-DIFFERENT PRODUCTS OF VECTORS AND THEIR GEOMETRICAL APPLICATIONS -Exercise
  1. vertors vecx , vecy and vecz each of magnitude sqrt2 , make an angle ...

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  2. If vecx xx vecy=veca, vecy xx vecz=vecb, vecx.vecb=gamma, vecx.vecy=1 ...

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  3. Find the derivative of y = cos^-1(1 − x).

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  4. Find the derivative of y = sin^-1(1 − x^2).

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  5. Given two orthogonal vectors vecA and VecB each of length unity. Let v...

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  6. Given two orthogonal vectors vecA and VecB each of length unity. Let v...

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  7. Given two orthogonal vectors vecA and VecB each of length unity. Let v...

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  8. Find the derivative of y=cos 2x^6.

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  9. Let veca= 2 hati + 3hatj - 6hatk, vecb = 2hati - 3hatj + 6hatk and vec...

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  10. Find the derivative of y=2sin 3x+5 cos 3x^4.

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  11. Consider a triangular pyramid ABCD the position vectors of whose angla...

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  12. Consider a triangular pyramid ABCD the position vectors of whone agula...

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  13. Consider a triangular pyramid ABCD the position vectors of whose angla...

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  14. Vertices of a parallelogram taken in order are A, ( 2,-1,4) , B (1,0,-...

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  15. Vertices of a parallelogram taken in order are A, ( 2,-1,4) , B (1,0,-...

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  16. Vertices of a parallelogram taken in order are A, ( 2,-1,4) , B (1,0,-...

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  17. Let vec(r) is a positive vector of a variable pont in cartesian OXY pl...

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  18. Let vec(r) is a positive vector of a variable pont in cartesian OXY pl...

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  19. Let vec(r) is a positive vector of a variable pont in cartesian OXY pl...

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  20. Ab, AC and AD are three adjacent edges of a parallelpiped. The diagona...

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