Home
Class 11
MATHS
If cos (alpha + beta) =4/5, sin (alpha -...

If `cos (alpha + beta) =4/5, sin (alpha - beta) =(5)/(13) and alpha, beta ` lies between `0 and (pi)/(4),` then `tan 2 alpha=`

A

`16/63`

B

`56/33`

C

`28/33`

D

None of these

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

If cos(alpha+beta)=4/5; sin(alpha-beta)=5/13 and alpha,beta lie between 0&pi/4 then find the value of tan2alpha

If cos(alpha+beta)=3/5 , sin(alpha-beta)=5/13 and 0

If cot (alpha + beta) = 0 , then sin (alpha + 2 beta) is equal to

2 sin ^(2) beta + 4 cos (alpha + beta) sin alpha sin beta + cos 2 (alpha + beta )=

If sin (alpha - beta) =1/2 and cos (alpha + beta) =1/2, where alpha and beta are positive acute angles, then alpha and beta are

If tan alpha = 1/5, tan beta =(1)/(239), then the value of tan (4 alpha -beta) is

If cos (theta -alpha) =a, sin (theta - beta) =b, then cos ^(2) (alpha - beta) + 2 ab sin (alpha - beta) is equal to

If cos(theta-alpha)=a , sin(theta-beta)=b then cos^2(alpha-beta)+2 ab sin(alpha-beta) is equal to

(cosalpha+cosbeta)^2+(sinalpha+sinbeta)^2= ............... A) 4 cos ^(2) ((alpha - beta)/(2)) B) 4 sin ^(2) ((alpha - beta)/( 2)) C) 4 cos ^(2) ((alpha + beta)/(2)) D) 4 sin ^(2) ((alpha +beta)/(2))