Integral Calculus 2/9

From Math World

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Education

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[monier20]

you are a great teacher..

u should get my tuition fees not those bastards at my uni.. :(

[09205479428]

Tnks to Math World, we could get quality education on-line.

[MrVader2001]

Thank you for helping sir! I'm still a 8th grader and I'm always curious how to solve integral calculus and your explanations really explains well.

[redrum41987]

@gbthebeast32 no problem :)

[gbthebeast32]

@redrum41987 ah so he is dividing by cos^2 jus for the hell of it now i see... so he using an already known trig identity and diving everything by a common trig term that still keeps the ratio the same so he could prove another trig identity is true....i get it hehe....just confusing to pull the cos^2 uot of no where lol..thank you for your help

[redrum41987]

@gbthebeast32 For cos^2(y)+sin^2(y)=1? With any equation, any at all, you can divided both sides with whatever you want. He did this because he was trying to get 1/cos^2(y). Since from trig, you know 1/cos(x)=sec(x). Say you had 1+x=3, dividing by both sides by any expression, say 2, still makes both sides equal.

[bebefore3]

if you have iphone or ipad and you want to calculate integrals check this app: itunes.apple.com/us/app/integr­­als/id471022211?mt=8

[gbthebeast32]

i dont understand how did you divide the cos^2 in the begining when it was addition?

[Phiba14]

hi Zoya!

[CatapilliarD10L]

like a boss

[claudeemmanuel]

My teacher never taught us how to derive these equations. I was amazed how easy this was. You really are a great Professor.