CBSE > Class 11 > Mathematics | CBSE Board | Homework Help

Because radius of the circle at point (2, -7) will be perpendicular to the tangent line, the slope of the radius is the negative reciprocal of the slope of the tangent line, 15, Write the equation of the line through the point with this slope:

−7=15(2)+b

b=−7−25

b=−375

y=15x−375 [1]

The center (h,k) will be at the intersection of equation [1] and the line:

x−2y=19 [2]

Substitute equation [1] into equation [2]:

x−2(15x−375)=19

x−25x+745=19

35x=215

x=7

Substituting for x in equation [2]:

7−2y=19

−2y=12

y=−6

Substitute the center (7,−6) and the point (2,−7) into the equation of a circle:

(2−7)2+(−7−−6)2=r2

#r = sqrt(26)

5Thank You

ANSWER

dy/dx =x+ycosx/1+sinx ,find partcular solution of differential equation when y=1,x=0

Posted by Abhi Naugain 6 years, 11 months ago

CBSE > Class 11 > Mathematics

1 answers

Sugam Kumari 4 years, 8 months ago

dy/dx=x+ycosx/1+sinx

1Thank You

ANSWER

Diffrentiate for x :- √cot√x

Posted by Rohan Singla 6 years, 11 months ago

CBSE > Class 11 > Mathematics

1 answers

Riya Singh 6 years, 11 months ago

1/2cot^-1/2√x×(-sec^2√x)×1/2x^-1/2

1Thank You

ANSWER

Find the equation of circle which touches the axes and whose centre lie on x-2y=3

Posted by Aditesh Singh 6 years, 11 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Find the value of tan π/8

Posted by Anil Sharma 6 years, 11 months ago

CBSE > Class 11 > Mathematics

1 answers

Akanksha Kumari? 6 years, 11 months ago

(2)^1/2 -1

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ANSWER

Cos20•cos40•cos60•cos80=1/16

Posted by Asif Hussain 6 years, 11 months ago

CBSE > Class 11 > Mathematics

4 answers

Akanksha Kumari? 6 years, 11 months ago

In place of 60 +30

3Thank You

Akanksha Kumari? 6 years, 11 months ago

I have mistaken i-e:(60+20)

1Thank You

Akanksha Kumari? 6 years, 11 months ago

@= 20

1Thank You

Akanksha Kumari? 6 years, 11 months ago

Use: cos @× cos (60-@)×cos (60+@) =cos 3@/4 and cos 60= 1/2 Therefore cos 20.cos40.cos60.cos80 =cos 20 cos (60-20) cos (60+30) cos60 = cos 60.cos60/4 = 1/2×1/2×1/4 =1/16

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Why we use h in limits questions .. When we have questions of L. H. S and R. H. S in exercise 13.1 questions from 25-28

Posted by Rashi Patel 6 years, 11 months ago

CBSE > Class 11 > Mathematics

2 answers

Akanksha Kumari? 6 years, 11 months ago

Ya we can use any letter in place of h

1Thank You

Raman Chauhan 6 years, 11 months ago

It is not neccesary to use h we use other word

0Thank You

ANSWER

The directrix of the parabola y²+4x+3 is

Posted by Aarti Kumari 6 years, 11 months ago

CBSE > Class 11 > Mathematics

2 answers

Aman Kumar 6 years, 11 months ago

Great

2Thank You

???. Pragati 6 years, 11 months ago

X=1/4☺️

2Thank You

ANSWER

Sinx=

Posted by Shivam Rai 6 years, 11 months ago

CBSE > Class 11 > Mathematics

1 answers

Suman Thapa 6 years, 11 months ago

Trigonometric Eq Sinx=Sinx.Cosx Derivatives of Sinx=Cosx

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n-4C4=15

Posted by Anjali Mittal 6 years, 11 months ago

CBSE > Class 11 > Mathematics

2 answers

Prakhar J 6 years, 11 months ago

n = 16 .....

0Thank You

Om Agarwal 6 years, 11 months ago

2Thank You

ANSWER

If 4-digit numbers greater than 5000 are randomly formed from the digits 0, 1, 3, 5 and 7 what is the probability of forming a number divisible by 5 when (i) the digits are repeated (ii) the repetition of digits is not allowed?

Posted by Mr Lalit Kumar Sharma 6 years, 11 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

y=√sinx by first principal

Posted by Vaibhav Mishra 6 years, 11 months ago

CBSE > Class 11 > Mathematics

1 answers

Suman Thapa 6 years, 11 months ago

f(x)=f(x+h)-f(x)÷h =sin(x+h)-sinx÷h =Applied S-S=2CS =2cos(2x+h÷2).sin(h÷2)÷h take LCM with h÷2 =cos(2x+h÷2).sin(h÷2)÷(Divide ) h÷2 =cos(2x+h÷2).sin(h÷2)÷h÷2 [sin(h÷2)÷h÷2=1] =limh~0 cos(2x+h÷2) .1 Ans:cosx

1Thank You

ANSWER

y=e√tanx

Posted by Vaibhav Mishra 6 years, 11 months ago

CBSE > Class 11 > Mathematics