Question

Jika sin(x-20) = cos(x+10), maka nilai x sama dengan ?
*jawab&caranya

Answer 1

Sin(x-20) = cos(x+10)
sin x = cos (90-x)
maka

cos(90 -(x-20) = cos(x+10)
90-x+20=x+10
100-20=2x
x=40

Semoga membantu