3 years ago

Which units in the metric system are used to measure distance?

1 answer:

3 0

Answer:

In the metric system of measurement, the most common units of distance are millimeters, centimeters, meters, and kilometers.

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What is the value of cos θ given that (-2, 9) is a point on the terminal side of θ?

liq [111]

Answer:

a) cosθ = $\frac{-2\sqrt{85} }{85}$

Step-by-step explanation:

Step(i):-

Given point ( x , y ) = ( - 2 , 3 )

We know that the polar co-ordinates

x = r cos θ and y = r sinθ

where $r = \sqrt{x^{2} +y^{2} }$

$r = \sqrt{(-2)^{2} +(9)^{2} } = \sqrt{4+81} = \sqrt{85}$

Step(ii):-

x = r cos θ

cosθ $= \frac{x}{r}$

cosθ = $\frac{-2}{\sqrt{85} } = \frac{-2}{\sqrt{85} } X \frac{\sqrt{85} }{\sqrt{85} }$

cosθ = $\frac{-2\sqrt{85} }{85}$

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3 years ago

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Answer:

9 = X -1 X = 10

Step-by-step explanation:

Add one to both sides

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The correct answer is 4> -3

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The second/below one is where point G in an orthocenter

Step-by-step explanation:

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