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Find the rectangular coordinates of the point that has polar coordinates , 4, −3π/4
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Mar 28, 2018
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Find the rectangular coordinates of the point that has polar coordinates , 4, −3π/4
Mathematics
high-school
Fraxture
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Fraxture
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hello :
x= r cos
θ
y= r sin
θ
r = 4 and
θ =
−3π/4
cos(
−3π/4 ) = cos( 3π/4 ) = cos ( π -
π/4) = - cos (
π/4)= -
√2/2
sin( −3π/4 ) = - sin( 3π/4 ) = - sin ( π - π/4) = -sin (π/4)= - √2/2
x = - 2 √2
y = - 2 √2
Marc Bernier
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Apr 2, 2018
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Marc Bernier
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