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Question
θ चे निरसन करा:
जर x = r cosθ आणि y = r sinθ
Sum
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Solution
x = r cosθ
y = r sinθ
x2 = r2 cos2θ
∵ `x^2/r^2 = cos^2theta` ...(1)
`y^2 = r^2sin^2theta`
`y^2/x^2 = sin^2theta`
`sin^2theta + cos^2theta = 1`
`y^2/r^2 + x^2/r^2 = 1` ...[सूत्र]
∴ `(x^2 + y^2)/r^2 = 1`
∴ `x^2 + y^2 = r^2`
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