How to find the maximum and minimum of sine cosine function? For example: y = 4-sin (- 5x + 60 degrees) and y = - 5cos (50 degrees - X / 2) + 4 Can you explain why you did that? Thank you; | Math enthusiast | Mathematical art

How to find the maximum and minimum of sine cosine function? For example: y = 4-sin (- 5x + 60 degrees) and y = - 5cos (50 degrees - X / 2) + 4 Can you explain why you did that? Thank you;

First of all, it should be clear that the range of cosx and SiNx is from - 1 to 1. No matter how the value of X changes, it should be discussed in a period according to the value range of X
For example: y = 4-sin (- 5x + 60 degrees)
Due to - 1

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