Mech : The Relative Velocity + Maths Trig : Angle of Elevation & Depression
Mech : the horizontal motion + Maths : Trigonometric functions of the Sum & Difference Between the measures of two Angles
Mech : The straight motion during Nth second + Trig : trigonometric Functions Of The Sum & Difference Between The Measures Of 2 Angles
Calculus : Differentiability Of A Function At A Point & Rule Of Differentiation