True or False: [5 Marks] 11. The derivative of a sinusoidal function is always an exponential function. 12. The rate of change of a sinusoidal function is never periodic in nature. 13. A sinusoidal function can be differentiated only if the dependent variable is measured in radians. 14. The derivatives of the reciprocal trigonometric functions can be found using the chain rule and their related base functions. 15. There are a limited number of tangents with a given non-zero slope to a sinusoidal curve