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(sin(x+y))/(sin(x-y))=(a+b)/(a-b), then ...

`(sin(x+y))/(sin(x-y))=(a+b)/(a-b)`, then `(tanx)/(tany)=?`

A

0

B

ab

C

`b/a`

D

`a/b`

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The correct Answer is:
D
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LUCENT PUBLICATION-ADVANCED TRIGONOMETRIC IDENTITIES-EXERCISE 13A
  1. Maximum value of 3 cos theta + 4 sin theta is

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  2. If tanalpha=(m)/(m+1)andtan beta=(1)/(2m+1), then (alpha+beta)=?

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  3. (sin(x+y))/(sin(x-y))=(a+b)/(a-b), then (tanx)/(tany)=?

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  4. If tan alpha = (5)/(6) tan beta = (1)/(11) then the value of alpha +...

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  5. Maximum value of sin (x + (pi)/(6)) + cos (x + (pi)/(6)) is

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  6. If cos(alpha+beta)=(4)/(5) and sin(alpha-beta)=(5)/(13) , where alpha ...

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  7. If A = sin^(2)x + cos^(4)x, where x in a real number

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  8. If x = tan 15^(@), y = cosec 75^(@) " and " z =4 sin 18^(@), then

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  9. If sin theta =3 sin ( theta + 2 alpha), then the value of tan (theta...

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  10. Expression (1)/(cos 290^(@)) + (1)/(sqrt(3) sin 250^(@)) equals

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  11. Find the value of:(1+cos""(pi)/(8))(1+cos""(3pi)/(8))(1+cos""(5pi)/(8)...

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  12. Prove that cos^(4)pi/8+cos^(4)(3pi)/(8)+cos^(4)(5pi)/8+cos^(4)(7pi)/...

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  13. cos""(pi)/(15).cos""(2pi)/(15).cos""(4pi)/(15).cos""(8pi)/(15) is equa...

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  14. (2)/(sqrt(2) + sqrt(2) + sqrt(2+2 cos 4x)) equals

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  15. The value of cos 15^(@) cos 7 ((1)/(2))^(@)sin 7 ((1)/(2))^(@) is

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  16. (cot x - tan x)/(cot 2x) equals

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  17. tan 67 (1^(@))/(2) + cot 67 (1^(@))/(2) equals

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  18. If sin 4 A - cos 2A = cos 4A - sin 2A, (0 lt A lt (pi)/(4)) then the ...

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  19. (3-4 cos 2theta + cos 4 theta) equals

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  20. If8 cos 2 theta + 8 sec 2theta = 65, 0 lt theta lt (pi)/(2) then the v...

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