Answer: 3 + 7i
Step-by-step explanation:
Equation expanded: 12 + 5i - 9 + 2i // now simplfy
12 - 9 = 3
5i + 2i = 7i
// together, we get
3 + 7i
Answer: -1/2
Step-by-step explanation:
Use double-angle identities:
cos(2θ)=cos^2θ−sin2^θ
cos(2θ)=1−2sin^2θ
cos(2θ)=2cos^2θ−1
sin(x)=1/2
cos(2x)=1−2sin^2x=1−2(1/4)=1/2
cos(4x)=2cos2^(2x)−1=2(1/4)−1=-1/2
Answer:
D. 69.2
Step-by-step explanation:
v= 3.14 ×2.1^2 × 5
v = 69.237
when you round it, it is
69.2 cubic cm
2(2+14) you just have to divide 4+28 by 2.
Answer:
I'm pretty sure its D
Step-by-step explanation:
