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azamat
4 years ago
10

Find the rectangular coordinates of the point that has polar coordinates , 4, −3π/4

Mathematics
1 answer:
kirill115 [55]4 years ago
6 0
Hello : 
 x= r cos<span>θ
 y= r sin</span><span>θ
r = 4   and  </span>θ =<span> −3π/4
cos( </span> −3π/4 )  = cos(  3π/4 ) = cos ( π - <span>π/4) = - cos (</span><span>π/4)= - </span><span>√2/2
</span>sin(  −3π/4 )  =  -  sin(  3π/4 ) = - sin ( π - π/4) = -sin (π/4)= - √2/2
x = - 2 √2
 y = - 2 √2

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Step-by-step explanation:

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17 + 3(z + -2) + -11z = -7(z + 2) + 14

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11 + -8z = -14 + 14 + -7z

Combine like terms: -14 + 14 = 0

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Solving

11 + -8z = -7z

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '7z' to each side of the equation.

11 + -8z + 7z = -7z + 7z

Combine like terms: -8z + 7z = -1z

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Combine like terms: -7z + 7z = 0

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Add '-11' to each side of the equation.

11 + -11 + -1z = 0 + -11

Combine like terms: 11 + -11 = 0

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Combine like terms: 0 + -11 = -11

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Divide each side by '-1'.

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Simplifying

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