1.7.18 Chain rule (A-level only)

The point $P\,$ lies on the curve with equation $\sec 3x$ with $x\,$ coordinate $π9\displaystyle \frac{\pi}{9}$ .

Find an equation of the normal to the curve at the point $P$ .

[6]

The point $P\,$ lies on the curve with equation $\sec 3x$ with $x\,$ coordinate $π9\displaystyle \frac{\pi}{9}$ .

Find an equation of the normal to the curve at the point $P$ .

[6]

1.7.18 Chain rule (A-level only) Questions