44%
6/10 = 3/5
3/5 x 1/10 = 3/50
3/50 x 1/10 = 3/500
3/500 / 2/6 = 44/100
Answer:
cos(400)
Step-by-step explanation:
Useful things:
Cofunction identity: sin(x)=cos(90-x)
Sine and cosine have period of 360 degrees.
So sin(50)=cos(40) by cofunction identity.
Since cosine has period of 360 degrees then cos(40)=cos(360+40).
That simplifies to cos(400).