Jika sin a = 2/3, maka nilai dari cot π/2 – a adalah… July 26, 2022 by Eiji Ctg(, )=cos(, ) \xf7 sin, ctg(, ) = sin a\xf7cos a = (2/3)\xf7(221a5/3)=2/221a5=2/5221a5,