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

Let 184 be the n th term of the sequence.
a = 3, d = 7-3= 4
therefore, 184 = a + (n-1) d
= 3 + (n-1) 4
184-3 = (n-1) 4
181 = (n-1) 4
n-1 = 181/4
n = 181/4 +1
n = 185/4
However, n should be a positive integer. Therefore, 184 is not a term of the given A.P.

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Dipanshu Choudhary 8 years, 3 months ago

1Thank You

ANSWER

Prove that Tan20 tan30 tan40 tan80 =1

Posted by Shariq Ahmad 8 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Gaurav Seth 5 years, 4 months ago

Step -by -step explanation: tan20° tan40° tan80° = 2sin20°sin40°sin80°/2cos20°cos40°cos80° = {cos(20°-40°)-cos(20°+40°)}sin80°/{cos(20°+40°)+cos(20°-40°)}cos80° = (cos20°-cos60°)sin80°/(cos60°+cos20°)cos80° = {2cos20°sin80°-2(1/2)sin80°}/{2(1/2)cos80°+2cos20°cos80°} [∵,cos60°=1/2] = {sin(20°+80°)-sin(20°-80°)-sin80°}/{cos80°+cos(20°+80°)+cos(20°-80°)} = (sin100°+sin60°-sin80°)/(cos80°+cos100°+cos60°) = {2cos(100°+80°)/2sin(100°-80°)/2 +√3/2}/{2cos(100°+80°)/2cos(100°-80°)/2+1/2} [∵, sin60°=√3/2 and cos60°=1/2] = (2cos90°sin10°+√3/2)/(2cos90°cos10°+1/2) = (√3/2)/(1/2) [∵, cos90°=0] = √3 = tan60° Now, tan30°tan60° = *= 1

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Utkarsh Raj 8 years, 3 months ago

Convert it into sin and cos

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ANSWER

How to convert numbers into factorial

Posted by Shivam Yadav 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Which is greater sin 1 radian or sin 1 degree?

Posted by Mansi Shrivastava 8 years, 3 months ago

CBSE > Class 11 > Mathematics

3 answers

Mansi Shrivastava 8 years, 3 months ago

R u sick Mr Mandeep Kumar Don't have work so wasting your time here in giving noncence reply....???

2Thank You

Mansi Shrivastava 8 years, 3 months ago

No answer is Sin 1 radian is greater than sin 1 degree

1Thank You

Mauryavanshi Akash 8 years, 3 months ago

Sin 1°

1Thank You

ANSWER

Value of sin18

Posted by Arun Yadav 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Write down all subsets possible subsets of ¤

Posted by Abhinav Srivastav 8 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Mansi Shrivastava 8 years, 3 months ago

It's only(-0-)fi

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ANSWER

Fubcf

Posted by Chogyal Rongkup 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Pls give me the solution of ch-3 supplementary solution

Posted by Rokr Utkarsh 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

How to take out (n) in case of Sn in gp

Posted by Akshit Dabral 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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If f (x)=(z-1)÷z+1 then f (f (x))=

Posted by Prajjwal Baranwal 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

How many even nos are therewith3 digitssuch that if 5 is one of digit then7 is next digit

Posted by Savreen Kahlon 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

If the sum of n terms of an ap is nP + 1/2 n(n-1)Q, where p and q are constants, find the common difference

Posted by Prabhat Kumar 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

What is the value of cos18 and how do we find it?

Posted by Rajnish Kumar 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

(a-b)(a+b)

Posted by Bhavesh Songara 8 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Sujal Mahajan 8 years, 3 months ago

a ^2 + b ^2

1Thank You

Shivam P 8 years, 3 months ago

a2-b2

2Thank You

ANSWER

If a and b are distinct integers prove that a-b is afactor of a ^n-b^n , whenever n is a positive integer

Posted by Mayank Saini 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

find the number of terms in expansion: (x-2y+3z) n

Posted by Raman Beniwal 8 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Lakshay Garg 8 years, 3 months ago

Sorry 3

0Thank You

Lakshay Garg 8 years, 3 months ago

0Thank You

ANSWER

2+2= 5

Posted by Mudit Lahoty 4 years, 8 months ago

CBSE > Class 11 > Mathematics

1 answers

Sia ? 4 years, 8 months ago

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ANSWER

f(x) = 2-|x-5| draw graf and find rang and domain

Posted by Santosh Pal 8 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Umesh Tevtiya 8 years, 3 months ago

Domain=real number.. And range= (-infinity ,2]

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ANSWER

Which term of the sequence/A.P. 20,77/4,37/2,71/4,..... is the first negative term

Posted by Harsh Dhattarwal 8 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Umesh Tevtiya 8 years, 3 months ago

0Thank You

ANSWER

5.4pr=6.5pr_1

Posted by Dheeraj Singh 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Cosacosa/2-cos3acos9a/2

Posted by Lav Sharma 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

8+8

Posted by Rishabh Singh 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

A room has 7 doors. In how many ways can a man enter the room through one door and come out through a different door?

Posted by Hduygcbn Duyfvv 8 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Lakshay Garg 8 years, 3 months ago

7¡×6¡

1Thank You

ANSWER

Find the ninth term in the expansion of [x/a -3a/x^2]^12.

Posted by Bhoomi Agrawal 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

What is cosine formula

Posted by Addya Sharma 8 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

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