Question

2arctan(3/4)

this is specifically a non calculator question

Answer 1

1.28700222 radians is that what your looking for?

Answer 2

the answer says 7/25 Im asking how they got that without a calculator?

Answer 3

oops

Answer 4

my fault the question is actually cos(arctan(3/4))

the answer is 7/25

Answer 5

ohhhh now i no what ya mean and ummm well if you think about it you can do it in your head if you really get it:)(:

Answer 6

well lol i dont get it thats why im asking xD

Answer 7

oh lol then i don't no hot to explain that

Answer 8

double angle formula

Answer 9

thats ridiculous dang this math problem

Answer 10

thx