Dentify the pattern for the following sequence. find the next three terms in the sequence. 5, 2, -1, -4, ____, ____, ____,...
1 answer:
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Answer:
Option A,
Step-by-step explanation:
Given: Deborah bought a computer for off the list price.
The list price is .
To find: The amount Deborah spent on the computer.
Solution: We have,
List price of the computer .
Deborah bought the computer for off the list price.
The amount Deborah spent on the computer
.
So, Deborah spent on the computer.
Hence, option A is correct.
Answer: see proof below
<u>Step-by-step explanation:</u>
Given: cos 330 =
Use the Double-Angle Identity: cos 2A = 2 cos² A - 1
Proof LHS → RHS:
LHS cos 165
Double-Angle: cos (2 · 165) = 2 cos² 165 - 1
⇒ cos 330 = 2 cos² 165 - 1
⇒ 2 cos² 165 = cos 330 + 1
Given:
Divide by 2:
Square root:
Scratchwork:
Since cos 165 is in the 2nd Quadrant, the sign is NEGATIVE
LHS = RHS
