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November 14, 2025, 11:21:49 am
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Author Topic: Trigonometry.... Help  (Read 3034 times)  Share 

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andy456

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Re: Trigonometry.... Help
« Reply #15 on: April 26, 2010, 12:17:58 pm »
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Quote from: Blakhitman on April 26, 2010, 11:08:11 am
CAS!

Remember to restrict the domain on the CAS though.
Thankyou, thankyou, thankyou
I didn't even think to graph it
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Blakhitman

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Re: Trigonometry.... Help
« Reply #16 on: April 26, 2010, 12:19:47 pm »
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No need to graph it.

Solve function ;)
« Last Edit: April 26, 2010, 12:21:22 pm by Blakhitman »
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the.watchman

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Re: Trigonometry.... Help
« Reply #17 on: April 26, 2010, 12:20:04 pm »
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Quote from: andy456 on April 26, 2010, 12:17:58 pm
Quote from: Blakhitman on April 26, 2010, 11:08:11 am
CAS!

Remember to restrict the domain on the CAS though.
Thankyou, thankyou, thankyou
I didn't even think to graph it

How about :P
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andy456

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Re: Trigonometry.... Help
« Reply #18 on: April 26, 2010, 12:24:07 pm »
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Quote from: the.watchman on April 26, 2010, 12:20:04 pm
Quote from: andy456 on April 26, 2010, 12:17:58 pm
Quote from: Blakhitman on April 26, 2010, 11:08:11 am
CAS!

Remember to restrict the domain on the CAS though.
Thankyou, thankyou, thankyou
I didn't even think to graph it

How about :P

I didn't think of that either. But I like the look of trig graphs so I will be graphing at every possibility :P
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andy456

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Re: Trigonometry.... Help
« Reply #19 on: April 26, 2010, 12:49:39 pm »
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Don't worry I figured it out, it helps if I read the textbook
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andy456

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Re: Trigonometry.... Help
« Reply #20 on: April 26, 2010, 01:48:32 pm »
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I'm having trouble with this question.



Would I change the domain to

?

and then work it out


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brightsky

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Re: Trigonometry.... Help
« Reply #21 on: April 26, 2010, 01:59:54 pm »
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Yep.

Perhaps thinking of it this way would help.

Let for clarity's sake.

Hence , where (because .

The base angle for this is: . Going around the unit circle, .

So the solutions are .

But .

So

Because

So



EDIT: not 180...D:
« Last Edit: April 26, 2010, 10:04:57 pm by brightsky »
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andy456

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Re: Trigonometry.... Help
« Reply #22 on: April 26, 2010, 02:06:42 pm »
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Ahhh I get it now thanks for that. It makes sense now
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TyErd

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Re: Trigonometry.... Help
« Reply #23 on: April 26, 2010, 08:05:02 pm »
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isnt the answer just 180?
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Yitzi_K

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Re: Trigonometry.... Help
« Reply #24 on: April 26, 2010, 08:12:29 pm »
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What ^ he said... if or then would be -1 not 1
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the.watchman

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Re: Trigonometry.... Help
« Reply #25 on: April 26, 2010, 08:16:02 pm »
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My solution:

First, because

Therefore,



(noting the restriction for '2x')

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TyErd

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Re: Trigonometry.... Help
« Reply #26 on: April 26, 2010, 08:22:29 pm »
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yup my solution is also
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brightsky

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Re: Trigonometry.... Help
« Reply #27 on: April 26, 2010, 10:05:45 pm »
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Oh god, how could I mistake as 180...D: Editted. :)
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