If `Tan69 + Tan66 - Tan69 Tan66 = 2 k` then `k =`

If tan69+tan66-tan69tan66=2k then k=

If tan 69^(@) + tan 66^(@) - tan 69^(@)tan 66^(@) = 2k then k = (a) -(1)/(2) (b) (1)/(2) (c) -1 (d)None of these

If tan 69^(@) + tan 66^@ - tan 69^(@) tan66^@=2k , then the value of k is

If (tan69^0+t a n 66^0) /(1-tan69^@tan66^@)=2k ,\ t h e n\ k= -1 b. 1//2 c. -1//2 d. 17

If Tan8A - Tan5A - Tan3A = K Tan8A Tan5A.Tan3A then K =

If Tan70^(@) - Tan20^(@) = k Cot40^(@) then k =

tan 6^@ . Tan 42^@. Tan 66^@ . Tan 78^@ is

Prove that : tan 69^@ + tan 66^@+ 1 = tan 69^@ tan 66^@ .

Simplify be reducing to a single term : (tan 69^(@) + tan 66^(@))/(1 - tan 69^(@) tan 66 ^(@))