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ch4aika [34]
2 years ago
15

Solve for y: 6x-2y= -8

Mathematics
1 answer:
Jlenok [28]2 years ago
4 0
Move all terms that don't contain y to the right side and solve y=3x+4
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Simplify using trigonometric identities<br> 2sinθ - sin2θ cosθ
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Double angle identity for sine:

\sin(2x) = 2 \sin(x) \cos(x)

\implies 2 \sin(\theta) - \sin(2\theta) \cos(\theta) = 2 \sin(\theta) - 2 \sin(\theta) \cos^2(\theta)

Factorize the left side.

2 \sin(\theta) - 2 \sin(\theta) \cos^2(\theta) = 2 \sin(\theta) \left(1 - \cos^2(\theta)\right)

Pythagorean identity:

\cos^2(x) + \sin^2(x) = 1

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Work out the perimeter of the triangle when the sides are : 3x-5 2x 19-x
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Step-by-step explanation:

The perimeter of the triangle is equal to the sum of its three sides.

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3x - 5 + 2x + 19 - x

Rearrange.

3x + 2x - x + 19 - 5

Add or subtract like terms.

4x + 14

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0.84375 :)
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