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berarti kalau di cari panjang yang satunya lagi, ( sisi depannya)
panjangnya = √ 4² - 3² = √ 16-9 = √7
sin α = √7/4
cotan = cos α / sin α
= 3/4 : √7/4
= 3/√7 ( kalau di rasionalkan)
= 3/√7 x √7/√7
= 3√7/7
ada gk jawabannya?