Question

to get a resultant from combining two vectors in opposite directions, you must _. add use a parallelogram subtract use trigonometric functions

Explanation:

When two vectors are in opposite directions, the resultant is found by subtracting their magnitudes. Adding is for vectors in the same - general sense of direction, the parallelogram method is for non - collinear vectors, and trigonometric functions are used for non - parallel vectors in more complex cases.

Answer:

subtract