Question

.

Answer 1

~0.85 I think.

Answer 2

remember that identity

cos² = 1-sin²?

square your sin.....then subtract it from 1

then square root that answer

I believe

Answer 3

I don't have a caluculator with me...but does that come to any one of your answer choices?

Answer 4

I got my calculator...and it does indeed

so square your sin

.5159² = .26615281

subtract it from 1

1 - .26615281 = .73384719

square root that answer

√.73384719

= .8566488137

which is answer choice B

Answer 5

haha no problem, glad to help :)