(11) sih 5 + 17 8 5 zie tana + tan-B + tan-y = r, at Ries wide fãs a + B + y = 0

If (1 + tanA ) (1 + tan B) = 2 ,then (A + B) is equal to

If tan A - tan B = x and cot A - cot B = y, then cot( A- B) =

In triangle ABC, tan A + tan B + tan C = 6 and tanA tanB = 2, then the values of tan A, tan B, tan C are, respectively:

Show that the orthocentre of DeltaABC having vertices A(x_1, y_1), B(x_2, y_2), C(x_3, y_3) is : (x_1 tan A + x_2 tan B + x_3 tan C)/(tan A + tan B + tan C) , (y_1 tan A + y_2 tan B + y_3 tan C)/(tan A + tan B + tan C))

If tan A - tan B = x and cot B - cot A= y, then cot (A-B) is

If (1 + tanA)(1 + tan B) = 2, then find the value of (A +B).

If tanA = 1/2 "and" tan B = 1/3, "then the value of" A + B "will be-"

If tan A - tan B =x and cot B - cot A=y, then: cot(A-B)=

If A+B+C= pi , prove that tan A+tan B+tan C= tanA tan B tan C