Answer:
Option C.
Step-by-step explanation:
The given expression is
It can be rewritten as
According to De moivre's Theorem:
![[r(\cos\theta+i\sin \theta)]^n=r^n(\cos n\theta +i\sin n\theta)](https://tex.z-dn.net/?f=%5Br%28%5Ccos%5Ctheta%2Bi%5Csin%20%5Ctheta%29%5D%5En%3Dr%5En%28%5Ccos%20n%5Ctheta%20%2Bi%5Csin%20n%5Ctheta%29)
Using De moivre's Theorem, we get
Therefore, the correct option is C.
Answer:
122˚
Step-by-step explanation:
1. Visual estimation
∠BXD is obtuse so ∠BXD > 90˚
If i am correct, these values should add to 360, so I do it by
140 + 110 + 62 = 312
360 - 312 = 48
So the value of the last side must equal 48.
Your answer would be x = -9. Proof:
If 9 is filled in, you would have
(3 - 5(-9))
(3 - (-45))
48
Then
48 + 140 + 110 + 62 = 360!
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Answer:
false
Step-by-step explanation:
A 256th note is known as a demisemihemidemisemi quaver
Answer:
16
Step-by-step explanation:
x² + 8x = 4 ⇔ x² + 8x + 16 = 4 + 16 ⇔ x² + 2×4x + 4² = 20 ⇔ (x + 4)² = (2√5)²
Remark : (2√5)² = 20
