WolframAlpha computational knowledge AI
solve -cos(x)*(l^2-(r*sin(x)-d)^2)^(3/2) + (sin(x)*(r*sin(x)-d)-r*cos(x)^2)*(l^2-(r*sin(x)-d)^2) - r*cos(x)^2*(r*sin(x)-d)^2=0 for x
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