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

y=(tan⁻¹x)² Diff.both sides y₁= 2tan⁻¹x/1+x² y₁(1+x²)=2tan⁻¹x Diff.both sides y₂(1+x²)+2xy₁= 2/1+x² y₂(1+x²)²+2y₁x(1+x²)= 2 (proved) Note- y₁=dy/dx , and y₂=d²y/dx

1Thank You

ANSWER

Three urns contains 2 red balls,3 black;3 red,2 black and 4 red ,1 black balls respectively. One of the urns is selected at random and a ball is drawn. If the ball drawn is red , find the probability that it is drawn from the second urn.

Posted by Prince Tholia 4 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Suryakant Swain 4 years, 1 month ago

Bro probability is not in our syllabus

0Thank You

ANSWER

A'(adj)=?

Posted by Saema Naaz 4 years, 1 month ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Find dy/dx in 2x+3y=siny

Posted by Thanushetty Shetty 4 years, 1 month ago

CBSE > Class 12 > Mathematics

2 answers

Shraddha ✨✰✰ 4 years, 1 month ago

,ANSWER 2x+3y=siny 2dx/dx + 3dx/dy=cosy×dx/dy 2=(cosy−3)dx/dy ⇒dx/dy=2/cosy−3

3Thank You

~@Kanchi Jawla 4 years, 1 month ago

dy/dx in 2x+3y=siny is given by- 2+3dy/dx=cosy dy/dx dy/dx=2/(cosy-3)

4Thank You

ANSWER

Inverse trigonometri

Posted by Anand Kumar Yadav 4 years, 1 month ago

CBSE > Class 12 > Mathematics

2 answers

Mohit Singh 4 years, 1 month ago

Hii

0Thank You

Shraddha ✨✰✰ 4 years, 1 month ago

What is your question?

0Thank You

ANSWER

Given that the two numbers appearing on throwing two dice are different. Find the probability of the event ' the sum of numbers on the dice is 4'

Posted by Umme Sidhrath 4 years, 1 month ago

CBSE > Class 12 > Mathematics

2 answers

Gaurav Seth 4 years, 1 month ago

Consider the given events
A = Numbers appearing on two dice are different
B = The sum of the numbers on two dice is 4

Clearly,
A = {(1, 2), (1, 3), (1, 4), (1, 5), (1, 6),
                     (2, 1), (2, 3), (2, 4), (2, 5), (2, 6),
                     (3, 1), (3, 2), (3, 4), (3, 5), (3, 6)
                     (4, 1), (4, 2), (4, 3), (4, 5), (4, 6),
                     (5, 1), (5, 2), (5, 3), (5, 4), (5, 6),
                     (6, 1), (6, 2), (6, 3), (6, 4), (6, 5)}
B = {(1, 3), (3, 1) and (2, 2)}

Now ,

A∩B={(1,3) and (3,1)}

∴ Required probability =P(B/A) = n(A∩B) / n(A) = 2 / 30 =1 / 15

0Thank You

Yogita Ingle 4 years, 1 month ago

When two dice are thrown, there are 36 possibilities.
However, we are given, every time both dice contain different numbers means doublet is not a possibility.
As, number of doublets are 6, so, sample space, S=36-6=30
Number of possibilities of the event when sum of dice is 4, (1,3),(3,1).
Here, we won′t take (2,2) as both dice contain different numbers.So,
E=2
So, P(E)=2/30=1/15

0Thank You

ANSWER

How can we find a unit vector perpendicular to two vectors? Doesn't n cap represent a vector perpendicular to two vectors? Why can't that be used in example 23?

Posted by Kajal Gupta 4 years, 1 month ago

CBSE > Class 12 > Mathematics

2 answers

Kajal Gupta 4 years, 1 month ago

Thank you, but my doubt is n cap is also a unit vector perpendicular to both a and b vector. Then why can't we use that?

1Thank You

Shraddha ✨✰✰ 4 years, 1 month ago

Cross product of vectors A and B is perpendicular to each vector A and B. ∴ for two vectors →Aand→B if →C is the vector perpendicular to both. =(A2B3−B2A3)ˆi−(A1B3−B1A3)ˆj+(A1B2−B1A2)ˆk .

1Thank You

ANSWER

MUJHE YE PUCHANA HAI KI BOARD MAI QUESTIONS TWIST KAR KAI ATA HAI YA DIRECT NCERT KA BOOK SAI DIA DIYA JATA HAI PLEASE BATA DO KOI

Posted by Adarsh Raj 4 years, 1 month ago

CBSE > Class 12 > Mathematics

4 answers

Ghanshyam Deshmukh 4 years, 1 month ago

Maths me question twist krne jaisa kuch nhi hai Basics clear hone chahiye ki question solve kaise krna hai phir toh board waale no. Bas change krte hai

0Thank You

Siddhi Singh 4 years, 1 month ago

Twist

3Thank You

Shraddha ✨✰✰ 4 years, 1 month ago

Twist

2Thank You

Aman Kumar 4 years, 1 month ago

Twist

2Thank You

ANSWER

Find the value of k so that the lines x=-y=kz and x-2=2y+1=-z+1

Posted by Ankit Sahu 4 years, 1 month ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

Examine the continuity of the function f(X)=X/sin3x,X not equal to 0 3,X= 0

Posted by Gy Rr 4 years, 1 month ago

CBSE > Class 12 > Mathematics

0 answers

ANSWER

What is solving of linear equations by two or three variables using inverse of matrices?

Posted by Bhavya Varshney 4 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Shraddha ✨✰✰ 4 years, 1 month ago

To solve a system of linear equations using an inverse matrix, let A be the coefficient matrix, let X be the variable matrix, and let B be the constant matrix. Thus, we want to solve a system A X = B \displaystyle AX=B AX=B.

2Thank You

ANSWER

Difference between relation and function

Posted by Radhika Singhania 4 years, 1 month ago

CBSE > Class 12 > Mathematics

1 answers

Gaurav Seth 4 years, 1 month ago

<th>

Definition	A relation is a relationship between sets of values. Or, it is a subset of the Cartesian product	A function is a relation in which there is only one output for each input.
Denotation	A relation is denoted by “R”	A function is denoted by “F” or “f”.
Example	R = {(2, x), (9, y), (2, z)} ** It is not a function, as “2” is input for both x and z.	F = {(2, x), (9, y), (5, x)}
Note:	Every relation is not a function.	Every function is a relation