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September 27, 2025, 01:25:04 pm
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goya101

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Question Need Help
« on: March 21, 2010, 06:50:23 pm »
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Find the implied domain and range of the function f(x) = arcsin(2 cos(x + pi/2 )).

AND

Let u = i + 2k and v = -i + 2j - 2k be vectors in R3. Find:
(a) 2u + (5/2)v (b) v - u (c) ||u|| (d) ||u + v|| (e) u (with that weird^ symbol on top) (f) v(with that weird^ symbol on top)

Suggested Solutions would be greatly appreciated, thanks in advance guys
« Last Edit: March 21, 2010, 07:31:34 pm by goya101 »
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superflya

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Re: Short Question, should be pretty straight forward
« Reply #1 on: March 21, 2010, 06:58:32 pm »
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its a composite function

find the domain and range of each seperately and work from there.

the 2nd question looks so weird i wont bother :P
« Last Edit: March 21, 2010, 07:00:22 pm by superflya »
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GerrySly

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Re: Question Need Help
« Reply #2 on: March 21, 2010, 08:17:18 pm »
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You can't do any of the second question?



Hopefully didn't make a mistake, but that's how'd you'd go about doing it :)
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superflya

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Re: Question Need Help
« Reply #3 on: March 21, 2010, 08:23:17 pm »
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Quote from: GerrySly on March 21, 2010, 08:17:18 pm
You can't do any of the second question?



Hopefully didn't make a mistake, but that's how'd you'd go about doing it :)

lol no just cbf deciphering what it read.
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GerrySly

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Re: Question Need Help
« Reply #4 on: March 21, 2010, 08:25:13 pm »
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Quote from: superflya on March 21, 2010, 08:23:17 pm
lol no just cbf deciphering what it read.

lol wasn't actually talking to you, he posted like all sub questions as if he just read it and said fuck it
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superflya

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Re: Question Need Help
« Reply #5 on: March 21, 2010, 08:27:12 pm »
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Quote from: GerrySly on March 21, 2010, 08:25:13 pm
Quote from: superflya on March 21, 2010, 08:23:17 pm
lol no just cbf deciphering what it read.

lol wasn't actually talking to you, he posted like all sub questions as if he just read it and said fuck it

oh haha my bad ;D
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Martoman

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Re: Question Need Help
« Reply #6 on: March 21, 2010, 08:38:38 pm »
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First one, express the ugly cos thing into a nice, elegant -sin(x)

So
Then

Restrict from there.
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Stroodle

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Re: Question Need Help
« Reply #7 on: March 22, 2010, 05:07:23 pm »
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Otherwise, it should be easy enough just to solve
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