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Tricky Trig Question watch

1. Trouble with only 7(c)

Is there any easier way to do that other than breaking it down into and (which becomes something like a 4th degree polynomial)? I've considered rewritting it as:

But the left side doesn't seem to factorize, so I don't know if that's much help.
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2. (Original post by SamKeene)
...
I suspect a misprint in the question and the first term should be in theta, not 2theta.

Hasufel posted a nice method with just theta, but has since withdrawn it. I suspect he was correct though.

As it stands, it's rather horrible, particularly when consider in the light of the difficulty of the previous two parts..
3. (Original post by ghostwalker)
I suspect a misprint in the question and the first term should be in theta, not 2theta.

Hasufel posted a nice method with just theta, but has since withdrawn it. I suspect he was correct though.

As it stands, it's rather horrible, particularly when consider in the light of the difficulty of the previous two parts..
I think you're right, seems to be a misprint, Wolfram Alpha gives absolutely horrendous answers to it.
4. (Original post by ghostwalker)
I suspect a misprint in the question and the first term should be in theta, not 2theta.

Hasufel posted a nice method with just theta, but has since withdrawn it. I suspect he was correct though.

As it stands, it's rather horrible, particularly when consider in the light of the difficulty of the previous two parts..
(Original post by Zacken)
I think you're right, seems to be a misprint, Wolfram Alpha gives absolutely horrendous answers to it.

Hmm thanks guys... it does seem like a misprint.

I posted another thread here with a question from the same exam, and earlier in the paper... which I suspect might be a misprint, could you check it out?
5. (Original post by Zacken)
I think you're right, seems to be a misprint, Wolfram Alpha gives absolutely horrendous answers to it.
Id just noticed the "2theta" in the squared term and thought "balls, i got it wrong" - but, i dunno now...

if its 2theta, the solutions are more hideous than Donattela Versace - allegedly - (covering myself legally!)

If it`s theta the solutions are basic and simple...

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