Which equation represents the line that passes through the points (1, 3) and (-2,5)?

Mathematics

1 answer:

Marina86 [1]3 years ago

7 0

Answer:

BOOOOOOOOOOOOOOOOOOOOOOMER

Step-by-step explanation:

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What the value of x plz

Gwar [14]

Well, the answer to this question is 55 degrees.
In this whole line intercept, the total number of degrees is 360 degrees and if 55 plus 55 equals to 110, then to solve the missing two angles, we can just subtract 110 from 360 which equals to 250 and lastly, we have to divide 250 by 2 which is 125.

3 0

3 years ago

How do I get this answer?

Keith_Richards [23]

Answer:

Step-by-step explanation:

Several trig identities are involved in the proof of this. This is the order in which they are used.

cos(2x) = cos²(x) -sin²(x)
cos²(x) +sin²(x) = 1
cos(x) = 1/sec(x)

<h3>Proof</h3>

Starting with the left side, we can transform it into the right side.

$2\cos(2x)=2(\cos^2(x)-\sin^2(x)) = 2(\cos^2(x)-(1-\cos^2(x)))\\\\=2(2\cos^2(x)-1)=2\left(\dfrac{2}{\sec^2(x)}-\dfrac{\sec^2(x)}{\sec^2(x)}\right)\\\\=\boxed{\dfrac{4-2\sec^2(x)}{\sec^2(x)}}$