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d/dx cos(x-a)/sin x

Posted by Manya Kumari 4 years, 4 months ago

CBSE > Class 11 > Mathematics

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Test divisibility of 67529124 by 8

Posted by Sure Success 4 years, 4 months ago

CBSE > Class 11 > Mathematics

2 answers

Sia ? 4 years, 4 months ago

The divisibility test of 8 is that the last 3 digits of a number should be divisible by 8.

124/ 8 = 15.5

As 124 is not exactly divisible by 8, 67529124 is not divisible by 8.

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Vanisha Saxena 4 years, 4 months ago

The divisibility test of 8 is that the last 3 digits of a number should be divisible by 8. 124/ 8 = 15.5 As 124 is not exactly divisible by 8, 67529124 is not divisible by 8.

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No. Of subset in natural no.

Posted by Nikhil Dixit 4 years, 4 months ago

CBSE > Class 11 > Mathematics

1 answers

Vanisha Saxena 4 years, 4 months ago

A={1,2,3,4,5,6,7,___,}

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-3x + 17 < -13 then

Posted by Balraj Kumar 4 years, 4 months ago

CBSE > Class 11 > Mathematics

1 answers

Nikhil Dixit 4 years, 4 months ago

X>10

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If (A-B) subset of (B-A), then a) A-B = B-A b) B Subset A c) A Subset B d) A union B = A

Posted by Nikhil Panda 4 years, 4 months ago

CBSE > Class 11 > Mathematics

2 answers

Vanisha Saxena 4 years, 4 months ago

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Ankit Kumar 4 years, 4 months ago

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If the arcs of same length in two circles subtend angles of 30° and 75° at their centres. Find the ratio of their radii.

Posted by Aryan Raj 4 years, 4 months ago

CBSE > Class 11 > Mathematics

1 answers

Anuditsingh Somvanshi 4 years, 4 months ago

The ratio of their radii is 5:2

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Section - A Let A = {x : x2 - 5x + 6 = 0},B={2 ,4}, C = {4, 5}. Write . If A = {1,2,3,4,5}, then write the number of proper subsets of A. If the arcs of same length in two circles subtend angles of 30° and 75° at their centres. Find the ratio of their radii. Let f= {(1, 1),(2, 3),(0, -1).(-1,-3)} be a linear function from Z to Z, find f(x). Section - B If n arithmetic means are inserted belween 20 and 80 such that the ratio of first mean to the last mean is 1:3, find the value of n. If in a triangle ABC, angle B= 60° and b : c = 5 : 42, then find angle A. Solve the equation sin x + sin 3x + sin x = 0. If one geometric mean 'G' and two arithmetic means 'p' and 'q' be inserted between two given quantities. prove that G2 = (2p - q)(2q - p). Solve the equation 2x2 + 3ix + 2=0 using general expression for a quadratic equation. If y = , find dydx at x = . Solve the inequation Find the sum of n terms of the series 12 + 32 + 52 + 72+ ........ Section - C Show by using principle of mathematical induction that for nN. Two cards are drawn at random from a pack of 52 cards. Find the probability that both the cards are of red colour or they are queen. If = a + ib, prove that a2 + b2 = 4a - 3. OR If (1 + x)n = a0 + a1x + a2x2 + a3x3 +...........+ anxn, prove that 2n = (a0 - a2 + a4-......) + (a1 - a3 + a5-......). Find the centre and radius of the circle (x cos + ysin - a)2 + (xsin - ycos - b2) = k2 . If varies, show that the locus of its centre is again a circle. Find the equation of the parabola whose focus is (1.1) and tangent the vertex is x + y = 1. Find the locus of a point such that the sum of its distances from the points (0.2) and (0.-2) is 6. Find OR Evaluate Find the derivative of tan(2x + 1) with respect to x from the first principles (i) How many different words can be formed with the letters of the word HARYANA? How many of these words begin with 11 and end with N? In how many of these words have H and N are together? OR From 6 gentlemen and 4 ladies, committee of 5 is to he formed in how many ways can this be done if (i) there is no restriction? (ii) the committee is to include at least one lady? Find the ratio in which the line joining the points A(2,1, 5) and B(3, 4, 3) is divided by the plane 2x + 2y - 2z = 1. Also, find the coordinates of the point of division. Section - D If 3rd, 4th, 5th terms in the expansion of (a + x)2 be 84, 280 and 360, find X. a and n. Prove that tan 6°.tan 42°.tan 66°.tan 78° = 1 OR If prove that ab + bc +ca. One side of a rectangle lies along the line 4x +7y + 5 = 0. Two of its vertices are (-3, 1) and (1, 1). Find the equation of the other three sides of the rectangle. Show that the equation 9x2- 16y2 - 72x +96y - 144 = 0 represents a hyperbola. Find the coordinates of the centre, length of latus-rectum, eccentricity, coordinates of foci and the equations of directrices. OR Identify the curve 4x2 + 9y2 - 8x - 36y + 4 = 0. Find the eccentricity.coordinates of centre, coordinates of foci, equations of directrices and length of latus rectum of the curve. Calculate the mean and standard deviation for the following data :Wages upto (in Rs.)153045607590105120No. of workers123065107157202222230

Posted by Aryan Raj 4 years, 4 months ago

CBSE > Class 11 > Mathematics

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If z=(√3÷2+i÷2)^5 + (√3÷2- i÷2)^5 then.

Posted by Satish Joshi 4 years, 4 months ago

CBSE > Class 11 > Mathematics

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22.Eash and Eashan arebtwins.Eash says that his age(inyears) when subtracted from its square lies between182and240.Eashan says that his age(inyears) when added to its square lies between210and272.i.Do the statement made by eash and eashna agree with each other.ii.Write the system of linear inequations giving an idea about their age.iii.Comment on the behavior of eash and eashan.

Posted by Shamsher Singh 4 years, 4 months ago

CBSE > Class 11 > Mathematics

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tan(2100)

Posted by Revanth Reddy 4 years, 4 months ago

CBSE > Class 11 > Mathematics

2 answers

Anuditsingh Somvanshi 4 years, 4 months ago

√3

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Revanth Reddy 4 years, 4 months ago

tan(2100)

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Show that every positive integer is either even or odd

Posted by Sonali Verma Myira Soni 4 years, 4 months ago

CBSE > Class 11 > Mathematics

2 answers

Preeti Dabral 4 years, 4 months ago

According to the question, we have to show that every positive integer is either even or odd.

Let us assume that there exists a smallest positive integer that is neither odd nor even, say n. Since n is the least positive integer which is neither even nor odd, n - 1 must be either odd or even.
Case 1: If n - 1 is even, n - 1 = 2k for some k.
But this implies n = 2k + 1
This implies n is odd.
Case 2: If n - 1 is odd, n - 1 = 2k + 1 for some k.
But this implies n = 2k + 2 = 2(k + 1)
This implies n is even.
Therefore,In both cases , we arrive at a contradiction.

Thus, every positive integer is either even or odd

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Manav Manav 4 years, 4 months ago

1-k

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what is sin x= 1 negative or positive? and sin x= -1 negative or positive?

Posted by Sneha Arora 4 years, 4 months ago

CBSE > Class 11 > Mathematics

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(Root3+i)^10=a+ib

Posted by Rekha Arora 4 years, 4 months ago

CBSE > Class 11 > Mathematics

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40 degree 15 minute 36 second class 11th maths

Posted by Anurag Rathore 4 years, 4 months ago

CBSE > Class 11 > Mathematics

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If 3cosx+ 4sinx=4 then the value of 3cosx-4sin is

Posted by Rohit Kumar 4 years, 4 months ago

CBSE > Class 11 > Mathematics

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Evaluate sin2x. X tends to x/4

Posted by Apeksha Dodyal 4 years, 4 months ago

CBSE > Class 11 > Mathematics

0 answers

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Cos X/1-sin X+1-sin X/cos X=2 sec X prove that

Posted by Shivani Sharma 4 years, 4 months ago

CBSE > Class 11 > Mathematics

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Three Haryana Roadways buses stop after 50,100,and, 125 km respectively. If they live together, then after how many kilometre will they stop together

Posted by Ankit Kumar 4 years, 4 months ago

CBSE > Class 11 > Mathematics

1 answers

Ankit Kumar 4 years, 4 months ago

Give answer

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Write the power set of

Posted by Yashika Changra 4 years, 4 months ago

CBSE > Class 11 > Mathematics

1 answers

Lata Kumari 4 years, 4 months ago

A power set is a set of collection of all the subsets of a set

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How many Basic theorems are there in Class 10 and which are deleted among it

Posted by Varun Shenoy 4 years, 4 months ago

CBSE > Class 11 > Mathematics

1 answers

Bhaduram Hembra 4 years, 4 months ago

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prove that: sin5x =5cos^4x sin x-10cos^2x sin^3x+sin^5x

Posted by Yashvi Gupta 4 years, 4 months ago

CBSE > Class 11 > Mathematics

0 answers

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Evaluate Cos930

Posted by Apple ☆ 4 years, 4 months ago

CBSE > Class 11 > Mathematics

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Calculate the arithmetic mean of a,a+d,a+2d,........a+(n+1)d

Posted by Swayamshree Rout 4 years, 4 months ago

CBSE > Class 11 > Mathematics

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√3-1/√3+1=2-√3= how?? Pls help

Posted by Deepak Gupta 4 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Ishita Gupta 4 years, 5 months ago

By rationalising.. (√3-1/√3+1)×(√3-1/√3-1) = (√3-1)²/(√3)²-(1)²[(a+b)(a-b)=a²-b²] = (3+1-2√3)/2 [(a-b)²=a²+b²-2ab] = (4-2√3)/2 = 2(2-√3)/2 = 2-√3= RHS

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If z and z1 are complex no. Such that 2z/3z1 is purely imaginary then prove that!z-z1/z+z1!=1

Posted by Abdul Samad 4 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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Write the following (1-2) as complex number 1: √_27

Posted by Khushpreet Kaur Beniwal 4 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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Let S ={a€N, a≤100} If the equation [tan2x]-tanx-a=0 has real roots then number of eliments in S is , (where [.] represents the greatest integer function)

Posted by Suma Gondkar 4 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

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if a b c are any three sets then a-(buc) is equal to

Posted by Henil Unadkat 4 years, 5 months ago

CBSE > Class 11 > Mathematics

2 answers

❤️Ritesh Gupta? 4 years, 5 months ago

Jjddkd

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Gurleen Singh 4 years, 5 months ago

Let x be any element of A - (B ∩ C). Then, x ∈ A - (B ∩ C) ⇒ x ∈ A and x ∉ (B ∩ C) ⇒ x ∈ A and x ∉ (B ∩ C) ⇒ x ∈ A and (x ∉ B or x ∉ C) ⇒ x ∈ A and x ∉ (B ∩ C) ⇒ x ∈ A and (x ∉ B or x ∉ C) ⇒ (x ∈ A and x ∉ B) or (x ∈ A and x ∉ C) ⇒ x ∈ A and x ∉ (B ∩ C) ⇒ x ∈ A and (x ∉ B or x ∉ C) ⇒ (x ∈ A and x ∉ B) or (x ∈ A and x ∉ C) ⇒ x ∈ (A - B) or x ∈ (A - C) ⇒ x ∈ A and x ∉ (B ∩ C) ⇒ x ∈ A and (x ∉ B or x ∉ C) ⇒ (x ∈ A and x ∉ B) or (x ∈ A and x ∉ C) ⇒ x ∈ (A - B) or x ∈ (A - C) ⇒ x ∈ (A - B) ∪ x ∈ (A - C) ⇒ x ∈ A and x ∉ (B ∩ C) ⇒ x ∈ A and (x ∉ B or x ∉ C) ⇒ (x ∈ A and x ∉ B) or (x ∈ A and x ∉ C) ⇒ x ∈ (A - B) or x ∈ (A - C) ⇒ x ∈ (A - B) ∪ x ∈ (A - C) ∴ A - (B ∩ C) ⊆ (A - B) ∪ (A - C) ⇒ x ∈ A and x ∉ (B ∩ C) ⇒ x ∈ A and (x ∉ B or x ∉ C) ⇒ (x ∈ A and x ∉ B) or (x ∈ A and x ∉ C) ⇒ x ∈ (A - B) or x ∈ (A - C) ⇒ x ∈ (A - B) ∪ x ∈ (A - C) ∴ A - (B ∩ C) ⊆ (A - B) ∪ (A - C) Similarly, (A - B) ∪ (A - C) ⊆ A - (B ∩ C) ⇒ x ∈ A and x ∉ (B ∩ C) ⇒ x ∈ A and (x ∉ B or x ∉ C) ⇒ (x ∈ A and x ∉ B) or (x ∈ A and x ∉ C) ⇒ x ∈ (A - B) or x ∈ (A - C) ⇒ x ∈ (A - B) ∪ x ∈ (A - C) ∴ A - (B ∩ C) ⊆ (A - B) ∪ (A - C) Similarly, (A - B) ∪ (A - C) ⊆ A - (B ∩ C) Hence, A - (B ∩ C) = (A - B) ∪ (A - C) Step-by-step explanation: HOPE THIS WILL HELP YOU THANKS?

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What are the subsets of the set A={phi,1}?

Posted by Roushan Kumar 4 years, 5 months ago

CBSE > Class 11 > Mathematics