Free sample · Sec 3 A-Math

One step, the way we teach it

This is Activity

10 A

from trigonometric functions — find the exact side

m

on the 30° — 60° — 90° triangle. No account needed.

I Do

The right triangle has hypotenuse $2$ and the side opposite 30° equal to $1$ . The remaining side $m$ is opposite 60°. Pythagoras gives $m^{2} + 1^{2} = 2^{2}$ .

Find m — the side opposite 60°

l is the hypotenuse

m is the side opposite 60°

We Do

Exact value of $m$ (the longer leg, opposite 60°).

You Do

Now the 45° — 45° — 90° triangle: both legs are $1$ . What is the hypotenuse $l$ ?

The full chapter continues from here

CAST, graphs, identities, and exam papers unlock after the parent PayNow subscription.

Start as a parent See pricing