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

If `(sin^4x)/2+(cos^4x)/3=1/5t h e n` `tan^2x=2/3` (b) `(sin^8x)/8+(cos^8x)/(27)=1/(125)` `tan^2x=1/3` (d) `(sin^8x)/8+(cos^8x)/(27)=2/(125)`

A

`tan^(2) x = ( 2)/( 3)`

B

`( sin ^(8) x )/( 8 ) + ( co s^(8)x)/(27) = ( 1)/( 125)`

C

`tan^(2) x = ( 1)/( 3)`

D

`( sin^(8)x)/( 8 ) + ( cos ^(8) x )/( 27) = ( 2)/( 125)`

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ML KHANNA-TRIGONOMETRY RATIOS AND IDENTITIES-PROBLEM SET (3) ( MULTIPLE CHOICE QUESTIONS)
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  2. If cos e ctheta-sintheta=a^3,sectheta-costheta=b^3, Prove that : a^2b...

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

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

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

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

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

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

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

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

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

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  16. 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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  17. 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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  18. If (x)/(cos theta)=(y)/(cos(theta-(2pi)/(2)))=(2)/(cos(theta+(2pi)/(3)...

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

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  20. |{:(cos ( theta +A), sin ( theta +A),1),(cos ( theta +B),sin ( theta +...

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