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Why ex 10.4 supplementary solutions are not added

Posted by Sanju Sharma 7 years, 2 months ago

CBSE > Class 11 > Mathematics

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Sin(x+y)/sin(x-y)=tanx+tany/tanx-tany prove that

Posted by Rohit Sharma 7 years, 2 months ago

CBSE > Class 11 > Mathematics

1 answers

Vivek G 7 years, 2 months ago

sin(x+y)=sinx.cosy+cosx.siny. sin(x-y)=sinx.cosy-cosx.siny. sin(x+y)/sin(x-y)={sinx.cosy+cosx.siny}/{sinx.cosy-cosx.siny}. divide each term by cosx.cosy. :it becomes tanx+tany/tanx-tany

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Who is doing preparation please tell of iit

Posted by Nandini Tamrakar 7 years, 2 months ago

CBSE > Class 11 > Mathematics

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If cos a = (cos u -e)/(1-ecos u) Then prove that Tan a /2 ={√(t+e)/(1-e)}*tan u/2

Posted by Shivam Kumar 7 years, 2 months ago

CBSE > Class 11 > Mathematics

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Derivative of e^sin(x) by first principal

Posted by Om Rathore 7 years, 2 months ago

CBSE > Class 11 > Mathematics

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A milk of 80% concentration is diluted at home by the seller by adding some water to it so that milk concentration is reduced between 65% to 70%. If 640 litres of milk of 80% concentrationis available, how much water has been added?

Posted by Ifrah Ayesha 7 years, 2 months ago

CBSE > Class 11 > Mathematics

2 answers

Madira Madhavi 4 years, 10 months ago

91.4<x<147.8

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Riya Sonker 5 years, 3 months ago

Answer

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Ch 9

Posted by Ayushi Upadhyaya 7 years, 2 months ago

CBSE > Class 11 > Mathematics

3 answers

Prakhar Dixit 7 years, 2 months ago

Ayushi ji kaha rahti hai love you

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Shivshant Upadhyay 7 years, 2 months ago

Sequence and series which is easy not very tough.

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Zehra Mustafa 7 years, 2 months ago

Ch 9 is seq. And series

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Sin5x= prove that

Posted by Gagan Choudhary 7 years, 2 months ago

CBSE > Class 11 > Mathematics

5 answers

Gagan Choudhary 7 years, 1 month ago

Sory my friends

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Gagan Choudhary 7 years, 2 months ago

Break the sin( 3x+2x) and use the identity of sin(A+B)

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Prakhar Dixit 7 years, 2 months ago

Shreya singh ji ye log khali time pass karte hain

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Udita Singh 7 years, 2 months ago

What is to prove?

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Udita Singh 7 years, 2 months ago

Sin 5x= ?

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in how many ways can 3 persons stay in 5 hotels?in how many of these each person stays in a different hotel.

Posted by Suhani Gupta 7 years, 2 months ago

CBSE > Class 11 > Mathematics

1 answers

Suhani Gupta 7 years, 2 months ago

i) first answer is 5^3 means 125 and (ii) 60

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Square

Posted by Om Shrivastava 7 years, 2 months ago

CBSE > Class 11 > Mathematics

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Find r if coefficient of (2r+1) and (r+2)th term in expansion of (1+x) raised to power 43 are equal.

Posted by Neeraj Punetha 7 years, 2 months ago

CBSE > Class 11 > Mathematics

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Given a gp with a 729 and 7th term 64 determine s....

Posted by Pappu Kumar 7 years, 2 months ago

CBSE > Class 11 > Mathematics

2 answers

Chirag Kaushik 7 years, 2 months ago

Put r=2/3 and a=729 in s7

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Chirag Kaushik 7 years, 2 months ago

Ar6=64 729r6=64 R6=64/729 R=2/3

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In the figure, AB parallel to CD. find the value of x

Posted by Murugharajendra Kinnal 7 years, 2 months ago

CBSE > Class 11 > Mathematics

1 answers

Abhishek Rai 7 years, 2 months ago

Pura question to likho

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The difference between two acute angles of a right angle triangle is π/9 radian. Find the angles and degree

Posted by Ishu Sen 7 years, 2 months ago

CBSE > Class 11 > Mathematics

1 answers

Satyam Kumar 7 years, 2 months ago

Let A&B be two angles of right tr.ABC Then, A+B=90° Also, A-B=20°[given] Solve these two equations to get ans.

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The focus of the parabola x, square -8x+ 2y +7=0 is ?

Posted by Pravigya Dubey 7 years, 2 months ago

CBSE > Class 11 > Mathematics

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Sum of m terms =n and sum of n terms =m then prove that sum of m+n terms = -(m+n)

Posted by Anil Godara 7 years, 2 months ago

CBSE > Class 11 > Mathematics

1 answers

Chesta Pawan Manchanda 7 years, 2 months ago

m=n/2(2a+(n-1)d) by solving this we get 2m=2an+dn^2-dn --------(1) then by same method 2n=2am+dm^2-dm------(2) from equation 1and 2 we get -2=2a+d(m+n)-1). Now s(m+n)=m+n/2(2a+(m+n)d ) now by equation 3 s(m+n)=-(m+n) hence proved

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If sum of first p terms of an Appointment is equal to the sum of the first q terms then find the sum of the first (p+q) terms

Posted by Chirag Kaushik 7 years, 2 months ago

CBSE > Class 11 > Mathematics