Hitunglah nilai dari cos 4X = -1/2

By Admin ReiPosted on December 3, 2022

Hitunglah nilai dari cos 4X = -1/2

$cos(4x) = - frac{1}{2} \ 4x = { cos}^{ - 1} ( - frac{1}{2} ) \ 4x = 120 \ x = frac{120}{4} \ x = 30$