Solving Vector C with Unit Vectors | Cross Product Help

AI Thread Summary
To express vector C using unit vectors, the equation C = 3.00A - 4.00B is given, with the expected result being C = 12.0i + 14.9j. The challenge arises from not knowing the components of vectors A and B, which are necessary for calculation. To find the unit vectors, each component of A and B must be divided by their respective magnitudes. Understanding the cross product is essential for solving this problem, as it relates to the direction and magnitude of the resulting vector. Proper calculation of unit vectors from A and B will lead to the correct expression for vector C.
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Homework Statement



use unit vectors to express the vector C where C=3.00A-4.00B
the answer is apparently C=12.0i + 14.9j

Homework Equations



cross product

The Attempt at a Solution



i have no idea where to even start how is it possible to find the i orj because i don't even know the components of A or B
 
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To find the unit vector you're going to have to divide each component of the vector by the magnitude of the vector.
 

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