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

From question. Y=tanx.secx.sinx.cosx. Taking log on both sides logY= log (tanx.secx.sinx.cosx) We know , log(mn)= logm+logn. Therefore logY=logtanx+logsecx+logsinx+logcosx. Differentiating on both sides d/dx(logY)/=d/dx(logtanx+logsecx+logsinx+logcosx). We know , d/dx of (a+b)=(d/dx of a)+(d/dx of b). d/dx of log x=1/x. 1/y×dy/dx=sec^2x/tanx+secx.tanx/secx+cosx/sinx+(-sinx/cosx) dy/dx=Y[sec^2x/tanx +tanx+cotx- tanx] Now put the value of Y. dy/dx=tanx.secx.sinx.cosx[sec^2x/tanx +cotx]. Write this in copy ,you will understand better. sec^2x means sec square x.

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Kalai Arasu 7 years, 4 months ago

Y=Sinx. Sinx. Cos. /Cosx Y=Sin²x Y’=2Sinx. Cosx Y’=Sin2x

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ANSWER

Evaluate I=1/[(sinx-2cosx) (2sinx+cosx)]

Posted by Kalai Arasu 7 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Evaluate I=1/(sinx cos^5 x)

Posted by Kalai Arasu 7 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

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From the top a cliff 20m high the angle of eleavtion of the top of a tower is found to be equal to the angle of depression of the foot of the tower find the height of the tower

Posted by Anuj Gaur 7 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

G K 7 years, 4 months ago

Let angle of elevation and depression is theta..... and distance b/w them..y... and height of tower be 20+x....then.... tan(theta)=20/y=x/y....hence x=20m....therefore height of tower is 20+x=20+20=40m.....

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23x-23x

Posted by Kabir Khan 7 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Shiva Tiwari 7 years, 4 months ago

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A door of width 6m has an arch above it having a height of 2m find the radius of the arch

Posted by Harsh Harshanth 7 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

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Find a unit vector perpendicular to the plane ABC when A B and C are given

Posted by Vishakha Jain 7 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Who gonna take full marks in Mathematics????????? ¿?

Posted by Sakshi Singh 7 years, 4 months ago

CBSE > Class 12 > Mathematics

2 answers

Garima Bansal 7 years, 4 months ago

Hehehe keep doing

1Thank You

Anjana Sherawat 7 years, 4 months ago

Believe in doing

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ANSWER

Ncert lesson 4.1 question 2

Posted by Suraj Suraj 7 years, 4 months ago

CBSE > Class 12 > Mathematics

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Sir In board examiniation i have a compartment in mathematics but i have again compartment in compartment ecamination of july month .Sir second chance in march So sir give me the procedure of March compartment examination.

Posted by Vikas Pandey 7 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

d/dx (2x)=?

Posted by Abhishek Pandey 7 years, 4 months ago

CBSE > Class 12 > Mathematics

2 answers

Abhay Rajput 7 years, 4 months ago

We will take Constant 2 ouside and dx/dx = 1 so 2 * 1 =2. so ans is 2

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Vinti Charandeep 7 years, 4 months ago

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Where matrics are used

Posted by Udit Mishra 7 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Manan Bedi 7 years, 4 months ago

In computer science

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Tanthretatan2threta=1

Posted by Abhishek Singh 7 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

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Definite integration of 2tan^3 dx from zero to π÷2

Posted by Shams Ahmad 7 years, 4 months ago

CBSE > Class 12 > Mathematics

3 answers

Manan Bedi 7 years, 4 months ago

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Sakshi Singh 7 years, 4 months ago

We have not done this up to now. Wait for some days. (Both of you)

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Anjana Sherawat 7 years, 4 months ago

Is it 3x??

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ANSWER

Which book is better for cbse board math exam?

Posted by Rohit Bhardwaj 7 years, 4 months ago

CBSE > Class 12 > Mathematics

5 answers

Akhilesh Yadav 7 years, 4 months ago

Arihant exampler and ncert

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Sakshi Singh 7 years, 4 months ago

mtg books and NCERT exemplar problems.

1Thank You

Hasan Ali 7 years, 4 months ago

S.l arora also for physics Modern abc for chemistry Aur xam idea also for chemistry

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Hasan Ali 7 years, 4 months ago

Pradeep for physics

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Abhay Rajput 7 years, 4 months ago

Ncert covers approximately 70 % of the board exam paper. And NCERT + RS ag. + Arihant Chapterwise Can hold approximately weightage of more than 90 % of the question paper.

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Integrate 1/sinx + secx

Posted by Ankit Pathak 7 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Integration of 1/sinx +secx

Posted by Ayush Katiyar 7 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Manan Bedi 7 years, 4 months ago

Write sec x as cos x in numerator and then let sin x=t

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Differentiation of cot inverse x cube

Posted by Aditi Bisen 7 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Prerna Kumari 7 years, 4 months ago

-3x^2/(1+x^6)

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What is first derivative test

Posted by Deeksha Nimje 7 years, 4 months ago

CBSE > Class 12 > Mathematics

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Show that the vectors a,b and c coplanar if a+b, b+c, c+a

Posted by Prableen Ghuman 5 years, 8 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

a to the power x+2 plz integrate this guys

Posted by Battini Rahul 7 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Aman Jain 7 years, 4 months ago

x+2to the power 3 upon 3

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If A is skew symmatrics matrics of order 3 then prove that A is 0

Posted by Vishal Kumar 5 years, 8 months ago

CBSE > Class 12 > Mathematics

1 answers

Ankit Muzalda 7 years, 4 months ago

Simple

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ANSWER

cos[sin-1 1/4 + sec-1 4/3]=simplify

Posted by Vishal Dhoble 7 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

From a lot of 20 bulbs which include 5 defective, a sanple of 3 bulbs is drawn at random, one by one with replacement. Find the probability distribution of no of defective bulbs.Also find the mean of distribution

Posted by Mukund Shahi 7 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

d/dx{sinx-xcosx/xsinx+cosx}

Posted by Avanish Kumar 7 years, 4 months ago

CBSE > Class 12 > Mathematics

1 answers

Shubham Tambi 7 years, 4 months ago

Use uv and u/v in this question

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Cos/√4-sin square x

Posted by Paras Aherwar 7 years, 4 months ago

CBSE > Class 12 > Mathematics

0 answers

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