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r-ruslan [8.4K]
3 years ago
13

How do you simplify sin2x=cosx

Mathematics
1 answer:
torisob [31]3 years ago
4 0
          sin(2x) = cos(x)
2sin(x)cos(x) = cos(x)  Expand sin(2x).
     2cos(x)      2cos(x) Divide 2cos(x) on each side.
            sin(x) = ¹/₂
    sin⁻¹[sin(x)] = sin⁻¹(¹/₂)   Use sin⁻¹(x) on each side.
                   x = 30, 150  Find the answer.
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Lorico [155]

Answer:

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5 0
3 years ago
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Mrs. Olga’s $250 investment earns 19% interest compounded annually. What will her balance be after 3 years?
Maurinko [17]

Answer:

The answer is A. $421.29

Step-by-step explanation:

Just keep finding 19% of the numbers next, and you add that all up and you get the answer.

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Anuta_ua [19.1K]
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Four times a first number decreased by a second number is - 14. The first
mel-nik [20]

Answer:

f = -5, s = -6

Step-by-step explanation:

F= first number

S= second number

4f - s = -14

f + 3s = -23

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13f = -65

————

13

f = -5

4f - s = -14

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-20 - s = -14

+20 +20

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———

-1

s = -6

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