3 years ago

What is the length of line AB? Given Line AB = 4x line BC = 2x + 6

Mathematics

1 answer:

erica [24]3 years ago

6 0

The answer to this is 16.

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Answer:

Step-by-step explanation:

The idea here is to get the left side simplified down so it is the same as the right side. Consequently, there are 3 identities for cos(2x):

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$\frac{\frac{cos^2x}{sin^2x} -\frac{sin^2x}{sin^2x} }{\frac{1}{sin^2x} }$

Notice I also wrote the 1 in terms of sin^2(x).

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$\frac{\frac{cos^2x-sin^2x}{sin^2x} }{\frac{1}{sin^2x} }$

The rule is bring up the lower fraction and flip it to multiply, so that will give us:

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And canceling out the sin^2 x leaves us with just

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Step-by-step explanation:

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