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777dan777 [17]
3 years ago
15

Help me with this algebra nation problem

Mathematics
1 answer:
Sergio [31]3 years ago
6 0

Answer:

  $295,245

Step-by-step explanation:

Each year the value is 0.9 times what it was the year before. After 5 years, the value is ...

  $500,000 × 0.9^5 = $295,245

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Find cos(2115°) and sin(2115°). Identify the measure of the reference angle.
ivolga24 [154]

Answer:

Cos(2115°) =1/√2

Sin(2115°) = -1/√2

Step-by-step explanation:

We have to find the values of Cos (2115°) and Sin (2115°).

Now, 2115° can be written as (23×90°+ 45°).

Therefore, the angle 2115° lies in the 4th quadrant where Cos values are positive and Sin values are negative.

Hence, Cos (2115°) = Cos(23×90° +45°) =Sin 45° {Since 23 is an odd number, so the CosФ sign will be changed to SinФ} =1/√2 (Answer)

Again, Sin (2115°) = Sin(23×90° +45°) = -Cos 45° {Since 23 is an odd number, so the SinФ sign will be changed to CosФ} = -1/√2 (Answer)

Now, the required reference angle is 45°. (Answer)

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Step-by-step explanation:

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