70以上 cos(π/2-θ) 272960-Cos(π/2-2θ) saelokijp5hp

The next value for which r = 0 r = 0 is θ = π / 2 θ = π / 2 This can be seen by solving the equation 3 sin (2 θ) = 0 3 sin (2 θ) = 0 for θ θ...