Please just tell me the answer, I don't need process and analysis. Thanks.

16. Sinusoidal functions do not have any critical points. 17. The product rule does apply when multiplying exponential functions with sinusoidal functions. 18. A sinusoidal function can be differentiated only if the independent variable is measured in degrees. 19. There aren't an infinite number of tangents with a given non-zero slope to a sinusoidal curve. 20. The derivative of f (x) = 2 cos 2x is an odd function. 21. The inverse of f (x) = In x is an exponential function. 22. Another way of expressing Inx is log x. 23. The derivative of an exponential function isn't always another exponential function. 24 . If y = e", then y' = ef (x). 25. The decay of a radioactive substance can be represented by more than one exponential model. 26. Simplify the expression elk In(ex ) + In(ex+1 ). (2 marks)