Question

/A+B/=√63and /A-B/=√37 and A=

Answer 1

Answer:

R.E.F image 

Given that a=6,b=3 & cos(A−B)=4/5

Solution :- We know that 

tan(2A−B)=1+cos(A−B)1−cos(A−B)

=1+4/51−4/5

=5+45−4=91=31

∴tan(2A−B)=31

mow, we know that, 

tan(2A−B)=a+ba−bcot2c

31=6+36−3cot2c

cot