Diket tan x = t, tentukan nilai sin 2x

TriGonoMetRi

tan x = t
sin x/cos x = t/1

r² = 1² + t² = 1 + t²

sin 2x
= 2 sin x . cos x
= 2 . t/r . 1/r
= 2t/r²
= 2t /(1 + t²)