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. Prove by mathematical induction that n(n + 1) is even

Posted by Iyappan Iyappan 3 months, 1 week ago

1 answers

Ambika Venkat 2 months, 1 week ago

If n is odd then n+1 is even so it's product is even If n is even then product of anything with even is even Thus n(n+1) is even

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4. Prove that sin^2 (8x) - sin^2 (3x) =sin 11x.sin 5x 04 1

Posted by Aditya Thakur 3 months, 2 weeks ago

CBSE > Class 11 > Mathematics

3 answers

Shivam Jha 3 months ago

As we know, Sin²x - Sin²y = Sin(x+y) Sin(x-y) Thus, Sin²8x - Sin²3x = (Sin8x + Sin3x) X (Sin8x - Sin3x) Since, Sinx + Siny = 2Sin[(x+y)/2] Cos[(x-y)/2] Sinx + Siny = 2Cos[(x+y)/2] Sin[(x-y)/2] (2Sin11x/2 X Cos5x/2) X (2Cos11x/2 X Sin5x/2) (2 Sin11x/2 X Cos11x/2) X (2 Sin5x/2 X Cos5x/2) Sin11x X Sin5x H.P! {2SinxCosx = Sin2x}

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ᥫ᭡ㅤᏒᴀᴜsʜꫝɴ .. 3 months, 2 weeks ago

There's a mistake done by me.. Sin(8x+3x).Sin(8x-3x) = sin11x.sin5x

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ᥫ᭡ㅤᏒᴀᴜsʜꫝɴ .. 3 months, 2 weeks ago

As we knw that, sin²x - sin²y = sin(x+y)sin(x-y) Therefore, Sin² 8x - Sin² 3x = Sin (8x+3x). × Sin(8x-3x) Sin11x.sin5x Hence LHS=RHS (proved)

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All chapters all formulas

Posted by Sumit Songara 3 months, 2 weeks ago

CBSE > Class 11 > Mathematics

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D/dx(x⁴sin²x)

Posted by Yukta Padikkal 3 months, 3 weeks ago

CBSE > Class 11 > Mathematics

1 answers

Radhika Thakur 3 months, 2 weeks ago

4x³-cos²1

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The Line joining A(4,3,2)and B(1,2,-3)meets the plane yoz,xoy in C,D respectively find the coordinates of c and D and the ratios in which they divide as

Posted by Vinitha.V Vinitha.V 3 months, 3 weeks ago

CBSE > Class 11 > Mathematics

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Evaluate: i + i ^ 2 + i ^ 3 + i ^ 4 +...+i^ x where, \ x / x is number of primes less than 73}.

Posted by Isha Isha 3 months, 3 weeks ago

CBSE > Class 11 > Mathematics

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Saloni home and school her school is at position A home at position B and shopping mall is at position C

Posted by Anjali Chauhan 4 months ago

CBSE > Class 11 > Mathematics

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Slop of line which make equal intercept on axis

Posted by Yoihenba Ningthoujam 4 months ago

CBSE > Class 11 > Mathematics

2 answers

Varnika Pv 3 months ago

-1

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Anshdeep Singh 3 months, 3 weeks ago

-1

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2+2/2

Posted by Abhi Patel 4 months, 1 week ago

CBSE > Class 11 > Mathematics

5 answers

Nisha Dwivedi 4 months ago

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Priyanshu Das 4 months ago

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Vinayak Airen 4 months ago

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Anshuman Raj 4 months ago

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Ishan Singh 4 months, 1 week ago

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What is the probability of selecting vowels in word 'PROBABILITY '

Posted by Naveen Selvan 4 months, 1 week ago

CBSE > Class 11 > Mathematics

5 answers

Vinayak Airen 4 months ago

4/11

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Anshuman Raj 4 months ago

4/11

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Abhi Patel 4 months, 1 week ago

4/11

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Suraj Singh 4 months, 1 week ago

In the word PROBABILITY there are 4 vowels,so the probability is 4/11

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Anu Awasthi 4 months, 1 week ago

In the word 'PROBABILITY' there are 4 vowels

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what is the equation of line that has y intercept 4 and is perpendicular to the kine y=3x-2? also, find the equation of the line, which makes intercept-3 and 2 on the y-axis respectively

Posted by Jairaj Bisht 4 months, 2 weeks ago

CBSE > Class 11 > Mathematics

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Value of tan degree and 30 minute

Posted by Greema Ruhil 4 months, 3 weeks ago

CBSE > Class 11 > Mathematics

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Find equation of the line parallel to the line 3x-4y+2 and passing through the point

Posted by Chirag Kumar 4 months, 4 weeks ago

CBSE > Class 11 > Mathematics

2 answers

Naahar Singh 4 months, 4 weeks ago

See if the equation is parllel slope is equal and then Use point slope form

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Ajay Kumar 4 months, 4 weeks ago

Friend equation of The parallel

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Find the number of terms in the expansion of (p^3-3p^2+3p-1)^23

Posted by Naina Panchal 5 months ago

CBSE > Class 11 > Mathematics

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Sin10+sin20+sin40+sin50=sin70+sin80

Posted by Anshpreet Singh 5 months, 1 week ago

CBSE > Class 11 > Mathematics

1 answers

Naahar Singh 4 months, 4 weeks ago

Make groups like sin 50 + sin20 after that sin10+sin40 Then solve RHS At the end LHS=RHS

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Case study base 11th relation function

Posted by Aditya Pratap Singh 5 months, 1 week ago

CBSE > Class 11 > Mathematics

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Deleted syllabus

Posted by Sagar Choudhary 5 months, 1 week ago

CBSE > Class 11 > Mathematics

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1. There are 5 letters and 5 different envelopes. The number of ways in which all the letters can be put in wrong envelope, is (a) 119 (b) 44 (c) 59 (d) 40

Posted by Anjali Bhujbal 5 months, 2 weeks ago

CBSE > Class 11 > Mathematics

3 answers

Naahar Singh 4 months, 4 weeks ago

119

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Sudhanshu . 5 months, 1 week ago

It's a concept of de- arrangement in PNC chapter...

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Sudhanshu . 5 months, 1 week ago

B) 44

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N(n-1)(n-2)(n-3)(n-4)÷5=24

Posted by Neelam . 5 months, 2 weeks ago

CBSE > Class 11 > Mathematics

2 answers

Aditya Sahu 4 months, 1 week ago

You can open and solve it but there is a trick n(n-1)(n-2)(n-3)(n-4) = 120 Now write 120 in multiples that are consecutive which are 1*2*3*4*5 so on comparing n=5

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Harshit Malik ... 5 months, 2 weeks ago

Kon se Topic ka question h yeh 🧐

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Find the mean derivation about the mean for data . 38,70,48,40,42,55,63,46,54,44

Posted by Tamil Arasan 5 months, 3 weeks ago

CBSE > Class 11 > Mathematics

1 answers

Abhishek Sonkar 5 months, 3 weeks ago

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How many 6 digits numbers can be formed from the digits 0,1,3,5,7,&9 which are divisible by 10 and no digit is repeated

Posted by Ankit Dangi 5 months, 3 weeks ago

CBSE > Class 11 > Mathematics

2 answers

Abhishek Sonkar 5 months, 2 weeks ago

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Abhishek Sonkar 5 months, 3 weeks ago

1,5

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Find the equation of line which passes through the point ( 2, 3 ) and making an angle of 45° degree with the line 3 X + Y - 6 =0

Posted by Hina Tanwar 5 months, 3 weeks ago

CBSE > Class 11 > Mathematics

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Activity: to plot the graphs of sinx , sin2x , 2sinx and sinx/2 using same coordinate axes

Posted by Chitransh Sahu 5 months, 3 weeks ago

CBSE > Class 11 > Mathematics

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Find the locus of mid point of the circle x²+ y² = a² which subtends a right at the point (c,0) .

Posted by Ojasav Goel 5 months, 3 weeks ago

CBSE > Class 11 > Mathematics

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Find the equation of circle passing through point (1,1) and it's centre lie on the intersection of the line . x+y=5, x-y=1

Posted by Komal Preet 5 months, 4 weeks ago

CBSE > Class 11 > Mathematics

1 answers

Yash Kumar 5 months, 4 weeks ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

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If (x/3+1, y-2/3) =(5/3, 1/3) find the value of x and y

Posted by Anirudh D Kashipathi 6 months ago

CBSE > Class 11 > Mathematics