Left panels: the dependence on the mutual inclination (i_m) of the amplitudes A_ℳ, for CoRoT-9b, for g₁ = 69° and g₁ = 158°. For other g₁ values the corresponding curves run within the area limited by these lines. (The two left panels are identical.) Middle and right panels: the corresponding A_1,2 amplitudes of the trigonometric representation (Eq. (32)) of the O−C for two different outer eccentricities e₂ = 0.3 (middle) and e₂ = 0.7 (right); and outer dynamical (relative) argument of pericentrum arguments g₂ = 0° (up) and g₂ = 90° (down). For the sake of clarity, we did not plot the small A₃ coefficients. (For e₂ = 0.0 the amplitudes of the two identical left panels are equal to A₂, while A₁ = A₃ = 0.)