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kipiarov [429]
4 years ago
5

Find cos(pi/2-theta), if sin theta = 0.45

Mathematics
1 answer:
valentina_108 [34]4 years ago
5 0
Answer:

cos(pi/2-theta)=sin(theta)

hence, cos(pi/2-theta)=0.45
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Answer:

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Step-by-step explanation:

y=-x+2\\y=3x-4

Let's solve one of them for x.

y=3x-4

Add 4

y+4=3x

Divide by 3.

x=\frac{y+4}{3}

Now, plug the value of y in the formula, or you can plug the value of x in the other equation. I'll take this one.

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add x

3x+x=6

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Simplify.

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Now that you found the value of x, replace it in any of the equations to find y.

y=-x+2\\y=-(\frac{3}{2})+2\\ y=-\frac{3}{2}+2

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\frac{1}{2}=\frac{9-8}{2}

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