Question

The legs of a right triangle measuring 5 inches and 7 units. If theta is the angle between the 5-inch leg and the hypotenuse, cos theta = ..what?

Answer 1

By Pythagorean's theorem, a^2 + b^2 = c^2
5^2 + 7^2 = c^2 
74 = c^2 
c = sqrt(74) 
So, now we know that the answer is 5/sqrt(74). 
This can also be written as (5sqrt(74))/74

Answer 2

the answer is .58 :)