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"cosec" 10^(@) - sqrt(3) " sec" 10^(@) ...

`"cosec" 10^(@) - sqrt(3) " sec" 10^(@)` =

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cosec"^(-1)(-sqrt(2))

Evaluate : (i) 3 cos 80^(@) "cosec 10"^(@) + 2 sin 59^(@) sec 31^(@) (ii) (cos 70^(@))/(sin 20^(@)) + (cos 59^(@))/(sin 31^(@)) - 8 sin^(2) 30^(@) (iii) "cosec" (65^(@) + A) - sec(25^(@) - A)

If lim_(xrarr2) (2x^2-4f(x))/(x-2) =m, where f(2)=2, f'(2)=1, then cosec 10^@-sqrt(3)sec10^@ is (A) 3m (B) 2m (C) m (D) none of these

10sqrt(12) -: 2sqrt(3)

Evaluate 3 cos 80 ^(@) cosec 10 ^(@) + 2 cos 59 ^(@) cosec 31 ^(@)

Prove that : sec (70^(@) - 0) = cosec (20^(@) + 0)

Evaluate : (i) cosec 82^(@)-sec8^(@) (ii) sec 70^(@)sin 20^(@)+cos 20^(@)cosec 70^(@)

Find the sum cosec^(-1) sqrt10 + cosec^(-1) sqrt50 + cosec^(-1) sqrt(170) + .... + cosec^(-1) sqrt((n^(2) + 1) (n^(2) + 2n + 2))

Find the exact value of coses 10^(@)+"coses"50^(@)-"cosec"70^(@)

Prove that sqrt(3) " cosec "20^(@)-sec 20^(@)=4

ALLEN-TRIGONOMETRIC RATIOS AND IDENTITIES-All Questions
  1. If 2tan10^0+t a n 50^0=2x ,\ "tan"20^0+"tan"5060=2"y","\ "2"tan"10^0+"...

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  2. If (3-4sin^2 1)(3-4sin^2 3)(3-4sin^2 3^2)(3-4s in 62\ (3^(n-1)))=s in ...

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  3. "cosec" 10^(@) - sqrt(3) " sec" 10^(@) =

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  4. Evaluate 4\ cos\ 20^0\ -sqrt(3)\ cot\ 20^0\ =

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  5. Evaluate (2cos 40^0-cos 20^0)/(sin 20^0)=

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  6. Find the value 2 sqrt 2 sin 10^0[(s e c5^0)/2+(cos40^0\ )/(sin5^0)-2si...

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  7. sin^6theta+cos^6theta\ \ for all theta

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  8. (log)(sqrt(5))[2(s intheta-costheta)+3]\ for\ a l l\ theta

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  9. Statement I: t a n5theta-t a n3theta-t a n2theta=t a n5thetat a n3thet...

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  10. Statement 1 is True: Statement 2 is True; Statement 2 is a correct ...

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  11. Statement I: sec^2theta=(4x y)/((x+y)^2) is positive for all real valu...

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  12. Statement 1 is True: Statement 2 is True; Statement 2 is a correct ...

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  13. Statement 1 is True: Statement 2 is True; Statement 2 is a correct ...

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  14. The value of cos((2pi)/7)cos((4pi)/7)cos((6pi)/7) is a.-1//2 b. \ 1//...

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  15. The value of Pi(r=1)^(7)cos.(pi r)/(15) is

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  16. Prove that: s inpi/(14)s in(3pi)/(14)s in(5pi)/(14)s in(7pi)/(14)s in(...

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  17. Which of the following is correct?

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  18. Find the degrees and radians the angle between the hour hand and the ...

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  19. One angle of a triangle is (4x)/3 grades and another is 3x degrees, wh...

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  20. If in a Delta ABC, cot A + cot B + cot C = sqrt(3) . Prove that trian...

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