First slide
Compound angles
Question

If tan x+tan 2x+tan 3x=tan x tan 2x tan 3x then value of |sin 3x+cos 3x| is ________.

Moderate
Solution

tan x+tan 2x+tan 3x=tan x tan 2x tan 3x x+2x+3x=,nZ x=/6, nZ |sin 3x + cos 3x|=1

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