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Find the principle value of the followin...

Find the principle value of the following
`cosec^(-1)(2)`

Text Solution

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`cosec(-pi/4)=-cosec(pi/4)=-1/sin(pi/4)=-1/((1/sqrt2))=-sqrt2`and `-pi/4 in [-pi/2,pi/2]-{0}`
`therefore`The principal value of `cosec^(-1)(-sqrt2)=-pi/4`
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A N EXCEL PUBLICATION-INVERSE TRIGONOMETRIC FUNCTIONS-QUESTION BANK
  1. Find the principle value of the following cosec^(-1)(2)

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  2. prove that tan^(-1) sqrt x = 1/2 cos^(-1)((1-x)/(1+x)), x in [0,1]

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  3. Prove that 3 sin ^(-1) x = sin^(-1) (3x - 4x^3), x in [-1/2,1/2]

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  4. prove that 3 cos^(-1) x = cos^(-1) (4x^3 - 3x), x in [1/2,1]

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  5. Prove that tan^(-1)(2/11) + tan^(-1)(7/24) = tan^(-1)(1/2)

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  6. Prove that 2 tan^(-1)(1/2) + tan^(-1)(1/7) = tan^(-1)(31/17)

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  7. Write the following functions in the simplest form : tan^(-1)((sqrt(...

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  8. Write the following functions in the simplest form : tan^(-1)(1/sqrt...

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  9. Write the following functions in the simplest form : tan^(-1) sqrt((...

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  10. Write the following functions in the simplest form : tan^(-1)((cos x...

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  11. Write the following functions in the simplest form : tan^(-1) (x/sqr...

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  12. Write the following functions in the simplest form : tan^(-1)((3a^2x...

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  13. Find the value of tan^(-1)[2 cos(2sin^(-1)frac(1)(2) )]

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  14. Find the value of cot(tan^(-1) a + cot^(-1) a)

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  15. Find the values of the following tan frac(1)(2) [sin^(-1)((2x)/(1+x...

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  16. If sin(sin^-1(frac(1)(5))+cos^-1(x))=1

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  17. If tan^(-1) ((x-1)/(x-2)) + tan^(-1) ((x+1)/(x+2)) = pi/4. then find t...

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  18. Find the value of sin^(-1)sin((2pi)/3)

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  19. Find the values of the following : tan^(-1)(tan frac (3pi)4)

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  20. Evaluate tan(sin^-1frac(3)(5)+cot^-1frac(3)(2))

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  21. find the value of cos^-1cos((7pi)/3)

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