Englishfor English speakers
trajectory
Noun
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Trajectory is the path that something like an arrow takes when it is shot into the air.
derivative
Adjective
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If something is derivative, it is obtained from something else
derivative
Noun
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A derivative is something which is based on another.
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A derivative is the derived function]] of another function (the slope at a certain point on some curve mathf(x)/math)
The derivative of mathf:f(x) = x^2/math is mathf':f'(x) = 2x/math
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The value of this function for a given value of its independent variable.
The derivative of mathf(x) = x^2/math at x = 3 is mathf'(3) = 2 * 3 = 6/math.