[" If "tan A=(5)/(6)" and "tan B=(1)/(11)],[" Show that "A+B=(pi)/(4)]

tan A=(5)/(6) andtanB =(1)/(11), prove that A+B=(pi)/(4)

If tan A=5/6, tan B=1/11," show that A+B=45"^(@) .

If tan alpha=(5)/(6) and tan beta=(1)/(11) , alpha and beta in (0,(pi)/(4)) . Then the value of cos[pi-(a+beta)] is

If tan alpha=(5)/(6) and tan beta=(1)/(11) , alpha and beta in (0,(pi)/(4)) . Then the value of cos[pi-(a+beta)] is

If tan A=(a)/(a+1) and tan B=(1)/(2a+1) then find the value of A+B=................. A) 0 B) pi/2 C) pi/3 D) pi/4

If A,B,C are three positiv acute angles and tan A = 1/2 , tan B = 1/5, tan C = 1/8,"show that",A+B+C = pi/4.

Prove that tan ((pi) / (12)) * tan (5 (pi) / (12)) * tan (7 (pi) / (12)) * tan (11 (pi) / (12)) = 1

If A-B=(pi)/(4) then (1+tan A)(1-tan B)=

tan ^ (- 1) ((a) / (b)) - tan ^ (- 1) ((ab) / (a + b)) = (pi) / (4)