rotation matrix to euler angle

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Hi, I have a 3X3 rotation matrix. I need to find out euler angle (rotation along x, y and z in terms of angle). I used cvRodrigues2(), but it giving rotation in terms of vector. any other function in opencv? thanking u I also tried Rx = atan2(r32,r33) Ry = atan2(-r31, sqrt(r32r32+r33fr33)) Rz = atan2(r21, r11)

but not getting proper result