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#301 Help Me ! » Area by integration » 2017-03-27 19:21:44

Zeeshan 01
Replies: 49

Find the area bounded by the curve y=x^3-4x and the x axis
Can any one explain this question with fig

#302 Help Me ! » Factorization » 2017-03-27 17:42:44

Zeeshan 01
Replies: 8

What is ax^2+bx+c and
What its use in factorization? ???

#304 Re: Help Me ! » Rationalization » 2017-03-18 15:30:59

What is trig substitution

When I do 1÷((x+2)^2+3^2)
It's tan formula

#305 Re: Help Me ! » Rationalization » 2017-03-18 05:32:47

I know !!!! But thx

And this question check this
∫ 1÷(x^2+4x+13)dx
How to solve this??

#306 Re: Help Me ! » Rationalization » 2017-03-18 00:32:08

Ok no one can wrong my method !!!

#308 Re: Help Me ! » Rationalization » 2017-03-17 15:09:03

I also know half angle but why not this

t both results have the same graph  ????? Where you plotted graph
Then I checked the identity and we have the same.  smile
Which identity???

#309 Re: Help Me ! » Rationalization » 2017-03-17 04:41:42

I solve ans is cosecx-cot x+c

#310 Re: Help Me ! » Rationalization » 2017-03-17 04:02:17

1÷sin^2 (x) -cos (x)÷sin^2 (x)

#311 Re: Help Me ! » Rationalization » 2017-03-17 02:40:49

By doing rationalization
1-cosx÷sin (x)^2
Then
1÷sin^2 (x) -cos (x)÷

#313 Re: Help Me ! » Rationalization » 2017-03-17 01:26:30

I know half angle but why we not rationaliz

How???
But cosine(x) isn't an irrational.  ??

Why we cannot multiply and divide by   1-cos (x)

#314 Re: Help Me ! » Rationalization » 2017-03-16 16:35:37

I perform rationalization and ans is wrong

#315 Help Me ! » Rationalization » 2017-03-16 16:34:35

Zeeshan 01
Replies: 25

Evaluate
∫ (1÷(1+cos×(x))
Why we cannot rationalise it with 1-cosx

#321 Re: Help Me ! » 4 steps of approximation » 2017-03-15 19:29:42

Hehe ...,,,, sorry for this how I write symbols

#323 Re: Help Me ! » 4 steps of approximation » 2017-03-15 19:27:36

Haha delta is £ because there is no symbol in my mob

#324 Help Me ! » 4 steps of approximation » 2017-03-15 16:01:44

Zeeshan 01
Replies: 40

Hi ;
Can anyone explain me these 4 steps
How
Dy=£y
Dx~~dx
F (x+£x)~~f(x)+dy
Dy=f (x)£x

#325 Re: Help Me ! » Increasing and decreasing concept » 2017-03-15 04:10:09

How we  get this?????
pi/4 and 3pi/4.

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