Home
Class 11
MATHS
(sin (n +1) A +2 sin n A + sin ( n -1) ...

`(sin (n +1) A +2 sin n A + sin ( n -1) A )/( cos (n +1) A - cos ( n -1) A )`=

A

`tan A//2`

B

`cot A//2`

C

`tan A `

D

`cot A`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • TRANSFORMATIONS

    AAKASH SERIES|Exercise LACTURE SHEET (EXERCISE-I Straight Objective Type Questions)|28 Videos

  • TRANSFORMATIONS

    AAKASH SERIES|Exercise LACTURE SHEET (EXERCISE-I More than One correct answer Type Questions)|5 Videos

  • TRANSFORMATIONS

    AAKASH SERIES|Exercise LECTURE SHEET (EXERCISE) ( LEVEL - II (ADVANCED) INTEGER ANSWER TYPE QUESTIONS)|7 Videos

  • TANGENT AND NORMAL

    AAKASH SERIES|Exercise ADVANCED SUBJECTIVE TYPE QUESTIONS|48 Videos

  • TRIGNOMETRIC EQUATIONS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (PRACTICE SHEET (ADVANCED) INTEGER TYPE QUESTIONS)|2 Videos

Similar Questions

Explore conceptually related problems

sin (n +1) x sin (n +2) x + cos (n +1) x cos (n +2) x = cos x

( sin(n+1) alpha - sin (n-1)alpha )/( cos (n+1) alpha + 2 cos n alpha + cos (n-1) alpha )=

If n is an odd integer than ((cos A + cos B)/( sin A - sin B))^(n) + ((sin A + sin B)/(cos A- cos B))^(n)=

If f(x) = (cos x + i sin x)(cos 3x + i sin 3x) ….(cos (2n - 1)x + i(sin(2n - 1)x) , then f^(11)(x) is

The period of sin (pix )/( n ) - cos ((pi x)/( n+1)) is

If theta _(1) ,theta _(2), theta _(3),.....theta _(n) are in A.P. then (sin theta_(1) + sin theta _(2 ) +...+ sin theta _(n))/( cos theta_(1) + cos theta _(2) + ...+ cos theta _(n))

(cos hx - sin hx)^(n) =

(cos h 2 + sin h 2)^(n) =

AAKASH SERIES-TRANSFORMATIONS -PRACTICE SHEET (EXERCIE) (LEVEL-I SINGLE ANSWER TYPE QUESTIONS)
  1. In a Quadrilateral ABCD, cos A.cosB + sin C sin D=

    Text Solution

    |

  2. The value of tan 9^(@) - tan 27^(@) - tan 63^(@) + tan 81^(@) is

    Text Solution

    |

  3. (sin (n +1) A +2 sin n A + sin ( n -1) A )/( cos (n +1) A - cos ( n -...

    Text Solution

    |

  4. (sin ^(2) A - sin ^(2) B)/( sin A cos A - sin B cos B) is equal to

    Text Solution

    |

  5. Let (sin(theta-alpha))/(sin(theta-beta))=(a)/(b) and (cos(theta-alpha)...

    Text Solution

    |

  6. sin A + sin B = sqrt(3) ( cos B- cos A )implies sin 3A + sin 3B=

    Text Solution

    |

  7. (sin 3 thea - sin theta sin ^(2) (2 theta ))/( sin theta + sin 2 theta...

    Text Solution

    |

  8. (cos 6 theta + 6 cos 3 theta + 15 cos 2 theta + 10)/( cos 5 theta + 5 ...

    Text Solution

    |

  9. If cos x + cos y + cos z =0 = sin + sin y +sin z then tan (x-y) =

    Text Solution

    |

  10. cos x + cos y + cos z = 0 and sin x + sin y + sin z, then cos ^(2) ((...

    Text Solution

    |

  11. If x and y are acute angle such that cosx+"cos" y=(3)/(2) and sin x+"s...

    Text Solution

    |

  12. If cos alpha+ cos beta= a, sin alpha+ sin beta= b and alpha- beta= 2 t...

    Text Solution

    |

  13. If cos (theta - alpha) , cos theta , cos (theta + alpha ) are in H.P....

    Text Solution

    |

  14. If sin (y+z-x), sin (z+x-y), sin (x+y-z) are in A. P , then prove that...

    Text Solution

    |

  15. If x,y,z are in A.P, then ( sin x - sin z)/( cos z - cos x) is equal t...

    Text Solution

    |

  16. If A, B, C, D be the angle of a quadrilateral, then (tan A + tan B + t...

    Text Solution

    |

  17. If cos theta (1) = 2 cos theta (2), then tan (( theta (1) + theta (2)...

    Text Solution

    |

  18. If (tan(alpha + beta - gamma))/(tan(alpha - beta + gamma)) = (tan gamm...

    Text Solution

    |

  19. (( cos alpha - cos 3 alpha ) ( sin 8 alpha + sin 2 alpha ))/( ( sin 5 ...

    Text Solution

    |

  20. If cos x + cos y - cos (x + y ) =3/2, the

    Text Solution

    |