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你如何将y = 3x ^ 2-5x-y ^ 2转换为极坐标方程?
R = - (sintheta + 5costheta)/(sin ^ 2theta-3cos ^ 2theta)为此,我们需要以下:x = rcostheta y = rsintheta rsintheta = 3(rcostheta)^ 2-5(rcostheta) - (rsintheta)^ 2 rsintheta = 3r ^ 2cos ^ 2theta-5rcostheta-r ^ 2sin ^ 2theta rsintheta + r ^ 2sin ^ 2theta = 3r ^ 2cos ^ 2theta-5rcostheta sintheta + rsin ^ 2theta = 3rcos ^ 2theta-5costheta rsin ^ 2theta-3rcos ^ 2theta = - sintheta-5costheta r =( - sintheta-5costheta)/(sin ^ 2theta-3cos ^ 2theta)= - (sintheta + 5costheta)/(sin ^ 2theta-3cos ^ 2theta)
你如何将y = 2y ^ 2 + 3x ^ 2-2xy转换为极坐标方程?
R = sintheta /(2sin ^ 2theta + 3cos ^ 2theta-sin(2theta))为此,我们需要:x = rcostheta y = rsintheta rsintheta = 2(rsintheta)^ 2 + 3(rcostheta)^ 2-2(rcostheta) (rsintheta)rsintheta = 2r ^ 2sin ^ 2theta + 3r ^ 2cos ^ 2theta-2r ^ 2costhetasintheta sintheta = 2rsin ^ 2theta + 3rcos ^ 2theta-2rcosthetasintheta sintheta = 2rsin ^ 2theta + 3rcos ^ 2theta-rsin(2theta)sintheta = r(2sin ^ 2theta + 3cos ^ 2theta-sin(2theta))r = sintheta /(2sin ^ 2theta + 3cos ^ 2theta-sin(2theta))
你如何将y + x = 3写入斜率截距形式?
Y = -x + 3斜率截距形式可以表示为y = mx + b为了得到这种形式的方程式,我们应该尝试单独得到y。从y + x = 3我们可以从两边减去x得到=> y = -x + 3现在是斜率截距形式:)