<span>The term that describes a function that is symmetric about the y-axis is an EVEN Function</span>
1) Tan45 = 1
2) Sin70 = 0.9397
3) Cos30 = 0.8660
4) Cos20 = 0.9397
Answer:
x + 90 + 63 = 180
Step-by-step explanation:
∠A + <u>∠B + 45</u> + 63 = 180 {Straight line angles}
From the figure we know that , ∠B + 45 = 90
Therefore, ∠A + 90 + 63 = 180
they easiest way to find the right answer is to look at the 2 first terms and checking if they equal 64x³
doing so:
A:
48x³+...
B:
64x³+...
C:
9x³-48x³+...
= -39x³+...
-> the answer should be B, to make sure this is the right answer, you can just solve B
B:
(4x+3)(16x²-12x+9)
= 64x³- 48x²+36x+48x²-36x+27
= 64x³+27
-> answer B is correct