Home
Class 11
MATHS
sin alpha + sin beta = 1/4 and cos alpha...

`sin alpha + sin beta = 1/4 and cos alpha + cos beta = 1/3`
The value of `cos ( alpha + beta)` is

A

`12/25`

B

`25/12`

C

`25/13`

D

`24/7`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • TRANSFORMATIONS

    AAKASH SERIES|Exercise LECTURE SHEET (EXERCISE) ( LEVEL - II (ADVANCED) MATRIX MATCHING TYPE QUESTIONS)|4 Videos

  • TRANSFORMATIONS

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

  • TRANSFORMATIONS

    AAKASH SERIES|Exercise LECTURE SHEET (EXERCISE) ( LEVEL - II (ADVANCED) MORE THAN CORRECT ANSWER TYPE QUESTIONS)|5 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 alpha + sin beta = 1/4 and cos alpha + cos beta = 1/3 The value of sin (alpha + beta) is

sin alpha + sin beta= 1/4 and cos alpha + cos beta = 1/3 The vlaue of tan (alpha + beta) is

If sin alpha = sin beta and cos alpha = cos beta then

If sin alpha + sin beta = a , cos alpha + cos beta = b " then cos ( alpha + beta ) =

Let alpha , beta be such that pi lt alpha - beta lt 3 pi . If sin alpha + sin beta =-(21)/(65) and cos alpha + cos beta =-(27)/(65) , then the value of cos""(alpha - beta )/(2) is

If cos alpha + cos beta = 1//2 and sin alpha + sin beta = 1//3, then