CBSE > Class 12 > Mathematics | CBSE Board | Homework Help

(using by part) int.cos2x log(sinx) =logsinx int.cos2x dx-int.(d/dxlogsinx int.cos2x) =logsinx sin2x/2-(cosx/sinx sin2x/2) =logsinx sin2x/2-(cosx/sinx 2sinx cosx/2) =logsinx sin2x/2-(cos squrex) =where cos2x=2cos squrex-1 = cos2x/2+1/2 =logsinx sin2x/2-(sin2x/4+(x/2)+c) Ans??

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Integrate dx/t

Posted by Dee Jay 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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Tell me easy trick for finding order and degree in differential equation

Posted by Sweety Yadav 7 years, 11 months ago

CBSE > Class 12 > Mathematics

2 answers

Ujjawal Sharma 7 years, 11 months ago

Yeah

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Sweety Yadav 7 years, 11 months ago

Is anyone's here

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Prove that (a+b).(a+b) = |a|2 +|b|2 if only if a,b are perpendicular

Posted by Jayesh Shrivastava 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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How to make perfect square

Posted by Avisha Goswami 7 years, 11 months ago

CBSE > Class 12 > Mathematics

1 answers

Ujjawal Sharma 7 years, 11 months ago

Just make all sides of a rectangle equal ;)

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What is lpp

Posted by Sagar Kamal 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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Ujjawal Sharma 7 years, 11 months ago

Linear Programming Problem, used to maximise or minimise given condition.

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Int log(1+x)/1+x^2dx within the limits 0 to 1

Posted by Md Kashif 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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using integration, find the area of the region bounded by line 4x-y+5=0, x+y-5=0 and x-4y+5=0

Posted by Fatima Khatun 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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Event E and F are such that P(not E or not F) =0.25 state whether E and F are mutally exclusive .

Posted by Navreet Kaur 7 years, 11 months ago

CBSE > Class 12 > Mathematics

1 answers

Navreet Kaur 7 years, 11 months ago

P(E'U F' )= P (EnF)'= 0.25 P(EnF)= 1-P(EnF) 1-0.25=0.75 Not mutally exclusive

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4655+64537

Posted by Abjeet Tiwari 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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How prepare in one month for math

Posted by Mohit Kumar 7 years, 11 months ago

CBSE > Class 12 > Mathematics

1 answers

Ujjawal Sharma 7 years, 11 months ago

Solve previous year paper

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Integrate -1 to 1 (x power 99 × cos power 4 x) dx

Posted by Manish Kumar 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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X is waiting for a cab. Every minute, there is a 75% chance that a cab arrives. If it arrives there is a 75% chance that X will not board it. The probability that X boards some cab in the next five minutes is

Posted by Sumit Thakur 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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If a binary operation is not commutative then it's identity element exists or not ?

Posted by Arvind Srivastava 7 years, 11 months ago

CBSE > Class 12 > Mathematics

1 answers

Ujjawal Sharma 7 years, 11 months ago

Identity element not depend on commutative property

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If tan a and tan b are 2 solutions of x^2 -px+q=0 cot a and cot b are roots of x^2 -rx + s =0 then value of RS is equal to

Posted by Mr Innocent 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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If magnitude of a vector equal to a ,then |avector ×icap|^2 + |avector×jcap|^2+ |avector×kcap|^2=?

Posted by Anand Kumar Jha 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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Solve the differantial equation (1+y2)(1+logx)dx +xdy =o

Posted by Prashant Chandila 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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If sinx is small then why sin x=x only

Posted by Dimpy Rajora 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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Integral of 1/(sinx+cosx)

Posted by Yo Malik 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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Find the value of c in Rolle's theorem for the function f(x)=x3 -3x in [-

Posted by Himakshi Kakati 7 years, 11 months ago

CBSE > Class 12 > Mathematics

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A ladder 5m long is leaning against a wall.the bottom of the ladder is pulled along the ground , away from the wall , at the rate of 3cm/s.how fast is its height on the wall decreasing when the foot of the ladder is 4m away from the wall

Posted by Aarti Kumari 7 years, 11 months ago

CBSE > Class 12 > Mathematics

1 answers

Anwesha Mishra 7 years, 11 months ago

Let y m be the height of the wall at which the ladder touches. Also, let the foot of the ladder be x maway from the wall.

Then, by Pythagoras theorem, we have:

x2 + y2 = 25 [Length of the ladder = 5 m]

⇒y=25−x2−−−−−−√
Then, the rate of change of height (y) with respect to time (t) is given by,

dydx=−x25−x2−−−−−−√.dxdt
It is given that

dxdt=2cm/s.
∴dydt=−2x25−x2−−−−−−√
Now, when x = 4 m, we have:

∴dydt=−2×425−42−−−−−−√=−83
Hence, the height of the ladder on the wall is decreasing at the rate of

83

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Integration of rootx

Posted by Ratik Manga 7 years, 11 months ago

CBSE > Class 12 > Mathematics