Angles could be expressed in degrees or in radians. The relationship between the two could be easily explained by illustrating a circle. A semi-circle has a total angle of 180°. This is equal to a π radians. So if the angle is π/2, in degrees, that would be 180/2 = 90°.
Then, determining the cosine 90° in a calculator would yield an answer of zero.
Answer:

Step-by-step explanation:
In a 45 45 90 triangle, the hypotenuse is equal to

where x is the length of a leg of the triangle
Answer:
n = 4
Step-by-step explanation:
triangle LMO is similar to triangle KNO, so LO / LM = KO / n. 10 / 8 = 5 / n. Solve, n=4
Answer:
7/1000 thousandths for place value
4 + 6 = 10
10 * 4 = 40.
The full equation looks like this....
4(4+6)
"Some Number" is 6.