Can you go from there?
Hi all again!
Hoping you can help me with this one as I dont really have a clue how to go about it properly:
Ive used all kinds of identities and get really long and nonsensical answers, if someone could take me through step by step that would be ideal;
I have the answer, I just need to know how to arrive at it!
Thanks in advance!
Rhys.
Of course! I am so dense! It's a quadratic, so I just use the quadratic formula to find cos x, yes? Will other other questions be similar to this? With the use of only one trig identity and doing the rest via algebra? Is it likely that with most equations I first have to make all the trig values the same so I can use them as a variable?
or should i factor?
Also: I cant find the trig identity that you used anywhere, the would you be able to find me a link where this one is stashed? There might be others there I am missing and don't know about.
Thanks again