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kotykmax [81]
3 years ago
14

Nicole used 3/8 of her ribbon ti wrap a present. if she used 6 feet of ribbon for the present how much ribbon did Nicole have at

first?
Mathematics
1 answer:
Gemiola [76]3 years ago
5 0
The answer is 8 feet long
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If sin theta=-1/4 and theta terminates in the third quadrant, find the exact value of sin2 theta.
DIA [1.3K]

Answer:

sin(2\theta)=\frac{\sqrt{15}}{8}

Step-by-step explanation:

We are given

sin(\theta)=-\frac{1}{4}

Firstly, we can draw triangle

angle lies in third quadrant

so, we get

cos(\theta)=-\frac{\sqrt{15} }{4}

now, we can use formula

sin(2\theta)=2sin(\theta)\times cos(\theta)

now, we can plug values

sin(2\theta)=2\times -\frac{1}{4}\times -\frac{\sqrt{15} }{4}

now, we can simplify it

and we get

sin(2\theta)=\frac{\sqrt{15}}{8}

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If the 7 was moved one place to the left, its value would be
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6. X=8cm
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