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What is the velocity

Posted by Himanshu Singh 6 years, 3 months ago

4 answers

Sia ? 6 years, 3 months ago

The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time.

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Shreya Parikh 6 years, 3 months ago

But firstly u have to learn acceleration and retardation

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Shreya Parikh 6 years, 3 months ago

Exactly as sia

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Robinpreet Kaur 6 years, 3 months ago

Sia is right

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tan 3x formula

Posted by Kamlesh Vijay 6 years, 3 months ago

CBSE > Class 11 > Mathematics

3 answers

Divya Garg 6 years, 3 months ago

(3tanx - tan^3x)/(1 - 3tan^2x)

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English Maths 6 years, 3 months ago

sin5π\12 - sinπ\12 \cos5π\12 + cosπ\12

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Harsh Mishra 6 years, 3 months ago

It is given in the summary of our NCERT book......

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Ch-4 5th sum from k+1

Posted by Sunil Anil 6 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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Ch-4 5th sum from let n=k+1

Posted by Sunil Anil 6 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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15 pr=2730 find r

Posted by Saksham Pareek 6 years, 3 months ago

CBSE > Class 11 > Mathematics

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Factarice (x+1)(x+2)(x+3)(x+4)-3=p(x)

Posted by Nandha Kumar 6 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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If Sin(x+y)/sin(x-y)=a+b/a-b . Prove that tanx/ tany=a/b

Posted by Anup Singh Baghel 6 years, 3 months ago

CBSE > Class 11 > Mathematics

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Between 1 and 31, m no. have been inserted in such a way that the resulting sequence is an A.P and the ratio of 7th and (m-1)th no. is 5:9 . Find the value of m

Posted by Anushka Shekhawat 6 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Sia ? 6 years, 3 months ago

1, A₁, A₂, A₃, ----- A_m, 31 are in AP.
a = 1
a_n = 31

{tex}a _ { m + 2 } = 314{/tex}

a_n = a + (n - 1)d
31 = a + (m + 2 - 1)d

{tex}d = \frac { 30 } { m + 1 }{/tex}

{tex}\frac { A 7 } { A _ { n - 1 } } = \frac { 5 } { 9 }{/tex} (Given)

{tex}\frac { 1 + 7 \left( \frac { 30 } { m + 1 } \right) } { 1 + ( m - 1 ) \left( \frac { 30 } { m + 1 } \right) } = \frac { 5 } { 9 }{/tex}

m = 1

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15pr=2730

Posted by Jitendra Kumar 6 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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What is square root

Posted by Sangeeta Gupta 6 years, 4 months ago

CBSE > Class 11 > Mathematics

2 answers

Sangeeta Gupta 6 years, 1 month ago

Yes

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Jheel Tippan 6 years, 3 months ago

R u asking for complex no.

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Difference between "belongs to" and "subset".

Posted by Shilpa Kumari 6 years, 4 months ago

CBSE > Class 11 > Mathematics

3 answers

Gaurav Seth 6 years, 4 months ago

uppose,

A={1,2,3,4,5,6}

B={2,4,6}

In this condition, every element in B is contained in A so,

B(A

But however, B is the set of even numbers and A is the set of natural numbers and thus they are very different in terms of n.

We write even number as 2n whereas natural number just n.

So, B doesn't belong to A.

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Ayush Vishwakarma?? 6 years, 4 months ago

Agar aditi Angel mile th plzz contact with me

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Rahul Raj 6 years, 4 months ago

1. "Belongs to".....if we say a belongs to A , it means a is itself an element of A or a is a member of A. 2."subset"......it is defined as part of a set.If we say set B is a subset of set A it means each element of B is a member of set A. Btt meanings r same nearly btt what is different in both......ex- if A ={1,2,3,4} then u can simply write 2 belongs to A btt to write as a subset u will have to write { 2} is a subset of A. ......well it is a nice question.it made think a little longer?? hope u will understand...

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Meaning of permutations

Posted by Birendar Kumar 6 years, 4 months ago

CBSE > Class 11 > Mathematics

4 answers

Iram Hasan Hasan 6 years, 3 months ago

A continuous product of natural numbers which can be arranged in order and the order is important.

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Ayush Vishwakarma?? 6 years, 4 months ago

Changing of order of any object or things

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Gaurav Seth 6 years, 4 months ago

Any of the ways we can arrange things, where the order is important.

Example: You want to visit the homes of three friends ("a"), ("b") and ("c"), but haven't decided in what order. What choices do you have?

Answer: {a,b,c} {a,c,b} {b,a,c} {b,c,a} {c,a,b} {c,b,a}

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Navneet Singh 6 years, 4 months ago

All formula chpater 3

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a+ar+ar*2+....+ar*n-1=a(r*n-1)/r-1

Posted by Isha Suryan 6 years, 4 months ago

CBSE > Class 11 > Mathematics

1 answers

Sia ? 6 years, 4 months ago

Let P(n) = a + ar + ar² + ..... + ar^n-1{tex} = \frac{{a({r^n} - 1)}}{{r - 1}}{/tex}.
For n = 1
{tex}P(1) = a{r^{1 - 1}} = \frac{{a({r^1} - 1)}}{{r - 1}} \Rightarrow a = a{/tex}
{tex}\therefore {/tex} P(1) is true
Let P(n) be true for n = k
{tex}\therefore P(k) = a + ar + a{r^2} + .... + a{r^{k - 1}}{/tex}{tex} = \frac{{a({r^k} - 1)}}{{r - 1}}{/tex} .... (i)
For n = k + 1
R.H.S. {tex} = \frac{{a({r^{k + 1}} - 1)}}{{r - 1}}{/tex}
L.H.S. {tex} = \frac{{a({r^k} - 1)}}{{r - 1}} + a{r^k}{/tex} [ Using (i)]
{tex} = \frac{{a{r^k}}}{{r - 1}} - \frac{a}{{r - 1}} + a{r^k}{/tex}
{tex} = a{r^k} \cdot \left( {\frac{1}{{r - 1}}+1} \right) - \frac{a}{{r - 1}} = \frac{{a{r^{k + 1}}}}{{r - 1}} - \frac{a}{{r - 1}}{/tex}{tex} = \frac{{a{r^{k + 1}} - a}}{{r - 1}}{/tex}
{tex} = \frac{{a({r^{k + 1}} - 1)}}{{r - 1}}{/tex}
{tex}\therefore {/tex} P(k + 1) is true
Thus P(k) is true {tex} \Rightarrow {/tex} P(k + 1) is true
Hence by principle of mathematical induction, P(n) is true for all {tex}n \in N{/tex}.

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Prove that sin²6x-sin²4x = sin2x sin10x

Posted by Tripti Verma 6 years, 4 months ago

CBSE > Class 11 > Mathematics

3 answers

Nitin Tiwari 6 years, 4 months ago

Taking RHS side Sin2x sin10x Sin(6x-4x) sin(6x+4x) (Sin6xcos4x - cos6xsin4x)(sin6xcos4x+cos6xsin4x) : (since-sin(A+B)=sinAcosB+sinBcosA)(sin(A+B)=sinAcosB- sinBcosA) Sin^2(6x)cos^2(4x) - cos^2(6x)sin^2(4x) Sin^2(6x)(1 - sin^2(4x)) - (1 - sin^2(6x))sin^2(4x) Sin^2(6x) - sin^2(4x)sin^2(4x) - sin^2(4x) + sin^2(6x )sin^2(4x) Sin^2(6x) - sin^2(4x) Hence . Proved

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Tripti Verma 6 years, 4 months ago

Thank you?

1Thank You

Rahul Raj 6 years, 4 months ago

LHS= sin(6x-4x)sin(6x+4x) =sin2xsin10x = RHS

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Draw a venn diagram to illustrate the folowing relationship among the sets E , M and U . Where E is the set of students studying english in a school , M is the set of students studying mathematics in the same school and U is the set of all students in that school .(i) all the students who study mathematics study english , but some students who study english do not study mathematics (ii)there is no student who study both mathematics and english (iii)some of the students study mathematics but do not study english , some study english but do not study mathematics , and some study both (iv)not all students study mathematics , but every students studying english studies mathematics .

Posted by Fathima Adeela 6 years, 4 months ago

CBSE > Class 11 > Mathematics