Home
Class 11
MATHS
If cos x + cos y - cos (x + y ) =3/2, th...

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

A

`x + y=0`

B

`x = 2y `

C

`x=y`

D

`2x =y`

Text Solution

Verified by Experts

The correct Answer is:
C
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

cos 3x + cos x - cos 2x =0

If cos (x-y) , cos x , cos (x+y) are three distinct numbers which are in harmonic progression and cos x ne cos y , " then " 1+ cos y =

int cos x cos 2x cos 3x dx=

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

If cos x + cos y + cos alpha = 0 and sin x + sin y + sin alpha = 0 , then cot((x+y)/(2)) =

If (cos x)/(cos y)=2 and cos(x-y) = sqrt(3)/2 , then tan y=

If x + y = 2pi//3 and cos x + cos y = sqrt(3)//2 , then x, y =

If cos x+ cos y = 1//3 , sin x + sin y=1//4 " then " cos (x+y)=

AAKASH SERIES-TRANSFORMATIONS -PRACTICE SHEET (EXERCIE) (LEVEL-I SINGLE ANSWER TYPE QUESTIONS)
  1. If cos x + cos y + cos z =0 = sin + sin y +sin z then tan (x-y) =

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  13. x tan ( theta - (pi)/(6)) = y tan (theta + ( 2pi)/(3)) implies (x + y)...

    Text Solution

    |

  14. If (1+sqrt(1+a)) tan alpha =1 + sqrt(1- alpha ) then sin 4 alpha =

    Text Solution

    |

  15. cos ^(3) x sin 2x = sum (x =0) ^(n) ar sin (rx) AA x in R, then

    Text Solution

    |

  16. If cos ^(2) A + cos ^(2) B = cos ^(2) C = 1 then show that Delta A...

    Text Solution

    |

  17. The value of ((cos A + coa B)/( sin A - sin B)) ^(2015) + ((sin A + si...

    Text Solution

    |

  18. (cos x )/( cos (x-2y))= lambda implies tan(x-y) tan y=

    Text Solution

    |

  19. If alpha + beta + gamma = 2 theta , " then " cos theta + cos ( theta...

    Text Solution

    |

  20. If A+B+C= 2S , " then " sin (S-A) sin(S-B) + sinS sin(S-C)=

    Text Solution

    |