Answer:
77 degrees
Step-by-step explanation:
Right triangles always add up to 180 degrees. We know that one angle is 23 degrees, angle A is missing, and the last angle is a right angle which is equal to 90 degrees. Knowing what we know, we must subtract the two known angles from 180 to get angle A.
180 - 90 = 90
90 - 23 = 77
Angle A is equal to 77 degrees.
hope this helps!! :]
<span>Different beverages may be absorbed at slightly different rates because of the drink’s size.</span>
Answer:
No there is no correlation between the hours spent on homework and the test scores.
Hope this helps!!!
Cos 157.5º=-cos (180º-157.5º)=-cos 22.5=-cos(45/2)
cos Ф/2=⁺₋√((1+cosФ)/2).
In this case 157.5º is in the second quadrant, therefore we use the following equation:
cos Ф/2=-√((1+cosФ)/2). (we will have a negative number)
cos 157.5º=-cos (45/2)=-√((1+cos 45º)/2)
=-√((1+√2/2)/2)
=-√((2+√2)/4)
=-√(2+√2) / 2 (≈-0.92387...)
Answer: cos 157.5º= -√(2+√2) / 2
