3 years ago

I'LL GIVE BRAINLIEST TO WHOEVER ANSWERS THE QUESTION CORRECTLY!!!!

Mathematics

1 answer:

Yakvenalex [24]3 years ago

7 0

I think it is false

I'm not sure if this is correct

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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

USE A NUMBER LINE TO FIND 8/9 / 8/45.

zhuklara [117]

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3 years ago

Malik buys and sells car parts. He bought two tires for $45.00 each and later sold them for $65.00 each. He bought three rims fo

saw5 [17]

The answer is 213 dollars

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Three of these turtles weight 1,050 pounds. How much does one Pinta Island Tortoise weight?

aleksklad [387]

Answer:

350 pounds

Step-by-step explanation:

Assuming three of the turtles are Pinta Island Tortoise, then:

3 turtles -- 1050

1 turtle -- 1050/3 = 350

Thenks and mark me brainliest :))

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3 years ago

Read 2 more answers

HELP ASAP PLZ IM TIMED

nasty-shy [4]

Answer:

Step-by-step explanation:

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2 years ago