And you know for conics; we derive the equation of chord of an ellipse....we get a gradient something like b (sin theta + sin alpha)/ something
do we have to derive the equation of the sum and product of sin and cos or just use the formula like in 3 unit?
People say study 'smart' not hard for HSC.
For chem and physics, are we supposed to memorise every single thing?
Like give us some tips on how to study 'smart' :)
Thanks