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If cos e ctheta-sintheta=a^3,sectheta-co...

If `cos e ctheta-sintheta=a^3,sectheta-costheta=b^3,` Prove that : `a^2b^2(a^2+b^2)=1`

A

`-1`

B

1

C

2

D

none

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ML KHANNA-TRIGONOMETRY RATIOS AND IDENTITIES-PROBLEM SET (3) ( MULTIPLE CHOICE QUESTIONS)
  1. If tan theta + sin theta = 1, " then" cos^(2) theta = n " then" m^(2)...

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  2. If cottheta+tantheta=xa n dsectheta-costheta=y , prove that (x^2y)^(2/...

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  3. If cos e ctheta-sintheta=a^3,sectheta-costheta=b^3, Prove that : a^2b...

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  4. If sin A + cos A = p, sin^(3) A + cos^(3) A=q, then

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  5. If x=sectheta-tantheta, and y=cosectheta+cottheta, then

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  6. If:x/a costheta+y/b s intheta=1a n dx/a s intheta-y/bcostheta=1, Prov...

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  7. If x=a cos theta + b sin theta and y=a sin theta - b cos theta. then ...

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  8. If p sec theta - b tan theta =a and q sec theta +a tan theta =b, then

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  9. If a+b tan theta = sec theta and b - a tan theta = 3 sec theta, then ...

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  10. For 0 lt phi le ( pi )/( 2), if x = sum(n=0)^(oo) cos^(2n) phi , y = s...

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  11. If tan x = ( 2b )/( a-c) , ( a cancel(=)c) y = a cos ^(2) x + 2b sin...

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  12. If sin x + cos x = sqrt( 2) cos x , then cos x - sin x is equal to

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  13. If theta is an acute angle and sin"" ( theta )/( 2) = sqrt((x-1)/( 2x)...

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  14. If a cos theta - b sin theta =c, " then" a sin theta + b cos theta is...

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  15. If sin A + sin 2A =x and cos A + cos 2A = y, then ( x^(2) + y^(2) ) ( ...

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  16. It is given that cos(theta-alpha)=a, cos(theta-beta)=b What is...

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  17. If a sin^(2)x+b cos^(2)x=c, b sin^(2)y+a cos^(2)y=d and atan x=btany t...

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  18. If (sin^4x)/2+(cos^4x)/3=1/5t h e n tan^2x=2/3 (b) (sin^8x)/8+(cos^...

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  19. If (x)/(cos theta)=(y)/(cos(theta-(2pi)/(2)))=(2)/(cos(theta+(2pi)/(3)...

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  20. If x sin theta = y sin ( theta + ( 2pi )/( 3)) = z sin( ( theta + 4pi ...

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