Question

tan ( cos^-1 4/5 + tan^-1 2/3) = ?

Answer 1

any help ?

Answer 2

i mean does this help * ?

Answer 3

cos^-1 4/5 = 37

Answer 4

you didnt need to know that for this ques..

Answer 5

maybe......use first tan (A+B),then tan(cos^-1 x) = sqrt(1-x^2)/x

Answer 6

cos^-1 4/5=tan^-13/4

Answer 7

hence the qn becomes
tan(tan^-13/4+tan^-1 2/3)

Answer 8

yes you may do that,,
what i was trying to state is
from the fig, or otherwise ,
cos^-1 4/5 = tan^-1 3/4

on that subsn, use identity of tan^-1 a + tan^-1 b

then its quite simple..

Answer 9

as @AravindG has stated already..

Answer 10

hw cos^-1 4/5=tan^-13/4 ???