2. P (2ap, ap^2) and Q (2aq, aq^2) are 2 points on the parabola x^2= 4ay with parameter values p=4 and q=-6. Show that the lines OP and OQ are inclined at 45 degrees to each other.

3. Solve the inequality

4. Show that 2cos(A - B)sin(A+B)= sin2A + sin 2B

5. The polynomial eq has roots

a, a^2 and a^3

Find in terms of b,c and d

Show that

thanks.