jika tg A = 0,5 maka sin 2A =...

Trigonometri

tan A = 0,5
tan A = 1/2

y = 1
x = 2
r = √1² + 2² = √5


sin 2A
= 2 sin A cos A
= 2 . y/r . x/r
= 2 . (1/√5) . (2/√5)
= 2 . (2/5)
= 4/5