Answer:

Step-by-step explanation:
To evaluate
from the following expression:

Taking 


∴ 
Answer:
Leg of an isosceles right triangle is 7.99 long.
Step-by-step explanation:
Given:
Length of the hypotenuse =11.31
To find:
Length of the leg of an isosceles right triangle =?
Solution:
According to Pythagorean's Theorem, we have
-----------------------------(1)
Here were are given as isosceles triangle, so the two sides will be of same length
So equation 1 can be rewritten as


Substituting the value of hypotenuse





a = 7.99
12.42
12°+.42(60)
12°25.2'
12°25'+.2(60)
12°25'12"