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3 years ago

How can you writhe a proportion that solves a problem in real life?

Mathematics

1 answer:

tresset_1 [31]3 years ago

7 0

In a store, you can buy 5 apples for $7, how much do 9 apples cost?

Proportion: 5 apples is to $7 as 9 apples is to x.

5/7 = 9/x

5x = 7 * 9

5x = 63

x = 63/5

x = 12.6

The cost of 9 apples is $12.60

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4 years ago

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$=(\sec A - \csc A)\left(1 + \dfrac{\cos^2 A + \sin^2 A}{\sin A\cos A} \right)$

$=(\sec A - \csc A)\left(\dfrac{1 + \sin A \cos A}{\sin A \cos A} \right)$

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$=\dfrac{\sin A - \sin A \cos^2A - \cos A + \cos A\sin^2A}{(\sin A\cos A)^2}$

$=\dfrac{\sin A(1 - \cos^2A) - \cos A (1 - \sin^2 A)}{(\sin A\cos A)^2}$

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3 years ago