Solving trigonometric equations involving multiple angles

Get the most by viewing this topic in your current grade. Pick your course now.

Now Playing:Solve trig equations involving multiple angles – Example 1a

Solve the following equations
i) State the general solution
ii) $0 \leq x \leq 2\pi$
1. $\sin 3x = - {1 \over 2}$
2. $\cos 2x = {\sqrt2 \over 2}$
3. $\tan {x \over 2} = -1$
4. $3\sin^2 2x -7 \sin 2x = 1 - 5 \sin 2x$
Solve: $\sin 2x - \cos 2x = 0$
$-180^\circ \leq x \leq 180^\circ$

No Javascript

It looks like you have javascript disabled.

You can still navigate around the site and check out our free content, but some functionality, such as sign up, will not work.

If you do have javascript enabled there may have been a loading error; try refreshing your browser.