Question

If Tan69+Tan66-Tan69.Tan66=2k then k=​

Answer 1

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Answer 2

Answer

69+66 = 135

apply tan on the both side

tan (69 + 66) = tan 135

tan 69 + tan 66 /1 - tan 69 . tan 66 = -1

tan 69 + tan 66 = -1 + tan 69 .tan 66

tan 69 + tan 66 - tan 69 .tan 66 = -1

k = -1/2

I hope this is helps you.