anonymous
  • anonymous
integral subsitution confused
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
|dw:1359530329483:dw|
anonymous
  • anonymous
|dw:1359530356277:dw|
anonymous
  • anonymous
|dw:1359530523166:dw|

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More answers

anonymous
  • anonymous
what the heck do you do after this
dumbcow
  • dumbcow
are those 9's inside radical ?
anonymous
  • anonymous
you dont have to write the whole steps like last time can you just give me advice and yes they are
anonymous
  • anonymous
and you can just make them easy by making them into (3/7x)^2
anonymous
  • anonymous
|dw:1359530730683:dw| (3/7x)^2 something like that for the bottom part
anonymous
  • anonymous
when you do it can you confirm that you get the same solution as in my solving part and help me from there on. thanks
dumbcow
  • dumbcow
ok i get same solution (i simplified the constants) \[\frac{343}{81}(\frac{\sec^{3} \theta}{3} - \sec \theta) +C\] now you have to substitute back in "x" \[\tan \theta = \frac{3x}{7}\] and \[\sec^{2} \theta = \tan^{2} +1 = \frac{9x^{2}}{49} +1 = \frac{9x^{2} +49}{49}\] take sqrt to get "sec" , then cube that to get sec^3
anonymous
  • anonymous
so you wouldd ger 3x +7 /7 ?
anonymous
  • anonymous
for sec
dumbcow
  • dumbcow
no it would be ... sqrt(9x^2 +49) /7 because of addition inside you can't just take sqrt of each term
anonymous
  • anonymous
oh right right silly me
anonymous
  • anonymous
|dw:1359532127694:dw|
anonymous
  • anonymous
is that it?
dumbcow
  • dumbcow
yep ... oh dont forget the 3 in denominator probably need to s.continue to simplify
anonymous
  • anonymous
but hold on my angles look like this |dw:1359532285169:dw|
dumbcow
  • dumbcow
hmm hypotenuse should be .... sqrt(9x^2 +49)
anonymous
  • anonymous
oh f i see why i forgot to square. its 2am and i had a long day -.-
dumbcow
  • dumbcow
haha time to get some sleep ....have wolfram do work for you
anonymous
  • anonymous
yep just finished it got the right answer thanks a lot time for bed i cant even think straight right now
anonymous
  • anonymous
u in us too?
dumbcow
  • dumbcow
yeah about 1 am here in AZ (best state)
anonymous
  • anonymous
and dont use wolfram like to get these things down myself
anonymous
  • anonymous
u in college?
anonymous
  • anonymous
taking engineering math not my strongest subject but where the jobs go i go XD
dumbcow
  • dumbcow
nope... finished with college , i work as a math tutor so i come on here to practice and help people
anonymous
  • anonymous
hmm so you planning to be a teacher you would be a good one
dumbcow
  • dumbcow
engineering is great field but tough classes have to take quite a bit of math
anonymous
  • anonymous
yep still got to diff linear algebra etc good night bed is calling for me :P
dumbcow
  • dumbcow
i qualified to be a teacher but am undecided .... i prefer tutoring 1 on 1 ..... classroom teaching isn't my style
dumbcow
  • dumbcow
bye
anonymous
  • anonymous
you would be a great 1 v1 tutor too yea good night

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