In the following question, Why can't we resolve horizontally like this:
Can someone explain, how this resolving is done. Thanks in advance.
Every diagonal vector can be broken down into horizontal and vertical components. For vector a, the horizontal component is found by taking the magnitude times cos 55. Thus 3 cos 55 gives you its horizontal force.
Since vector b is horizontal only, it gets added to 3 cos 55. Is that what you're asking?
To find the components of vector a,
where is the magnitude (size) of vector a and is the angle between the vector and the +x axis.
Does this help?