Question:
why horizontal component is always a cosine function and vertical as sine function ? In some cases the horizontal changed to vertical component and vertical to horizontal.Why it is like that?
Answer:
It is not about the horizontal or the vertical component. It is about the angle θ. The side opposite to θ is taken as sin and the side adjacent to θ is taken as cos function.
In the diagram shown, as sin function is opposite side/ Hypotenuse, we find the horizontal component as sin function.
In this diagram, we find sin function to be the vertical component because of the angle orientation.
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