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1. 1. Solve algebraically the equation 2 sin 2x = -1 for (between 0 and 180 degrees)

2.Express sinx cos 60 - cos x sin 60 in the form sin (A-B)

Hence solve the equation sin x cos 60 - cos x sin60 = 3/4 for (between 0 and 360)

3. Solve algebraically for (between 0 and 360)

4. cos 2x - 2 sin x 0 1= -

5. Prove that cos (x-y)/cos x cos y = 1 + tan x tan y

Any help is greatly appreciated, thank you.
2. You posted your whole homework assignment....
3. (Original post by gilbo)
You posted your whole homework assignment....

Yes I know I can't do it...
4. you batty boy do it yourself
5. Sorry mate I'm not doing your homework for you xD

Perhaps the exercise book may give a helping hand?
6. (Original post by Wesssty)
Sorry mate I'm not doing your homework for you xD

Perhaps the exercise book may give a helping hand?

I've tried the textbook honestly, I really need help...
7. Find the page on trig identities and see if you can substitutes some of the expressions in your homework for something easier.

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Updated: January 26, 2010
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