Recent content by Dundee3

Edited! We've spent some time together today, Mate. Have a good one! I actually have an exam later, so this will really help. You're a life-saver.

It makes perfect sense! Thank you so much! I was never familiar with the identity: $$1 - \cos10\theta = 2\sin^2(5\theta)$$ Thank you again!

Hey fellahs, got another whopper that's killing me. $$1 - \cos2\theta + \cos8\theta - \cos10\theta=?$$ My objective here is to complete the identity, and my worksheet lists the correct solution as: $$4\sin\theta\cos4\theta\sin5\theta$$ And once again I've had trouble beating this one. This...

$$\sin5\theta\sin8\theta\cos5\theta\cos8\theta=$$$$\frac{1}{2}[\cos(5\theta - 8\theta) - \cos(5\theta+8\theta]1/2[cos(5\theta-8\theta)+cos(5\theta + 8\theta)]$$ $$\frac{1}{4}[\cos3\theta - \cos13\theta][\cos3\theta + \cos13\theta]$$ $$\frac{1}{4}[\cos^2(3\theta) - \cos^2(13\theta)]$$ That's...

Superb. I'll create the new thread shortly, and I will be happy to post the solution for the last problem that involves my work. For future posts, I was wondering if there was a certain trick to activate the 'Latex' text-formatting so that I may enter more legible characters into my posts? I've...

Nailed it.Would it be presumptuous to ask for help on another?

Hey homies, I've been working on some of my usual jazz, when I came across one hiccup. My problem is this: sin(5x)sin(8x)cos(5x)cos(8x) x = theta, and my objective is to complete the identity.According to my notes, the correct solution is: [cos^2(3x) - cos^2(13x)] / 4I just can't bring my...

Thank you so much =) Is there a way I can repay you?

Thank you so much! Correcting the typo in the first problem made everything fall perfectly into place. You did an incredible job and I thank you for it. My only concern was on the second expression. Doing the computation we're left with: tanB(cotB - tanA) And, I've noticed on my original...

Hey guys, I'm just going over my work files for this week and I've noticed 2 problems that have fooled me, and seem a little bizarre for my current mathematical level. They do involve trig, and a part of me is hoping for a misprint on the sheet, but I'm more sure that it's my own inadequacies...

Brilliant. Simply brilliant. Thank you!

Hey guys, I've been trying to wrap my mind around this problem but I've really come up short. Any help would be amazing. If tanX=10 Find the exact value of cot(pi/2 - x)