How to define trigonometric ratios

1 answer:

4 0

They are ratios of two sides of a right triangle and a related angle. Trigonometric functions are typically used to calculate unknown lengths or angles in a right triangle.

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Whats the difference of the two expression? (3/7x+9)-(2/7x-3)

Aleksandr-060686 [28]

$\left(\frac{3}{7}x+9\right)-\left(\frac{2}{7}x-3\right)\\\\=\frac{3}{7}x+9-\frac{2}{7}x-(-3)\\\\=\frac{3}{7}x+9-\frac{2}{7}x+3\\\\=(\frac{3}{7}x-\frac{2}{7}x)+(9+3)\\\\=\frac{3-2}{7}x+12\\\\=\boxed{\frac{1}{7}x+12}$

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Nonamiya [84]

Answer:

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Step-by-step explanation:

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maxonik [38]

Answer:

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Step-by-step explanation:

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