Cos(x) = 10.5 / 20
cos(x) = 0.525
answer
C.
x = 58.3"
1. C
2. A
Hope this helped, enjoy your day.
Answer:
B.
Step-by-step explanation:
Answer:

Step-by-step explanation:
Factorise the numerator and denominator
8a² - 2 ← factor out 2 from each term
= 2(4a² - 1) ← 4a² - 1 is a difference of squares
= 2(2a - 1)(2a + 1)
4a² + 4a + 1 ← is a perfect square
= (2a + 1)²
Thus

=
← cancel (2a + 1) on numerator/ denominator
= 
= 