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pentagon [3]
3 years ago
10

3y+3 (1-y)-y=-6PLEASE help

Mathematics
1 answer:
Murrr4er [49]3 years ago
7 0
3y+4+3y-y=-6
6y-y+4=-6
5y+4=-6
5y=-10
y=-2
If you have any questions let me know
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Vitek1552 [10]

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this expression best matches with left side of the formula:

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-----------

For cos(75)-cos(15), we will use formula:

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\cos\left(75\right)-\cos\left(15\right)=-2\sin\left(\frac{75+15}{2}\right)\sin\left(\frac{75-15}{2}\right)

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4 0
3 years ago
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