C3 Help

Can anyone help me with part a please? I'm completely lost!
Thanks! :smile:

Original post by clarewithnoi

Can anyone help me with part a please? I'm completely lost!
Thanks! :smile:

Have you tried writing everything in terms of Sin(x) and Cos(x)

Have you tried writing everything in terms of Sin(x) and Cos(x)

yep I've gotten this far! Do I just try and collect the terms and use the quadratic formula?

Original post by clarewithnoi

yep I've gotten this far! Do I just try and collect the terms and use the quadratic formula?

Once you have changed

\cos ^2x

into

1 - \sin ^2x

so that you actually have a quadratic

Your guide to handling revision and exam stress

Open days: five mistakes to avoid

Help! I’m having second thoughts about my uni choice

Why I loved studying online