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Prove that cos(π÷2+x)secxtanπ-x÷sec2π-xsinπ+xcotπ÷2-x=-1

Posted by Cutie Patidar 6 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

In a group of 400 people 250 can speak eng only and 70 can speak hindi only . Find no. Of people those can speak both eng nd hindi.

Posted by Mona Sharma ? 6 years, 5 months ago

CBSE > Class 11 > Mathematics

2 answers

Sia ? 6 years, 5 months ago

Let H be the set of people speaking Hindi and E be the set of people speaking English.
{tex}\therefore{/tex} n(H) = 250, n(E) = 70 and {tex}n(H \cup E) = 400{/tex}
We have to find {tex}n(H \cap E){/tex}
We know that {tex}n(H \cap E) = n(H) + n(E) - n(H \cap E){/tex}
{tex}\therefore 400 = 250 + 70 - n(H \cap E){/tex}
{tex}\therefore n(H \cap E) = 450 - 320 = 130{/tex}

Yashpal Negi 6 years, 5 months ago

80 can speak both english and hindi

ANSWER

Cos^-1(3x-1)

Posted by Raja Mishra 6 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

What is the value of tan 300 degree ??

Posted by Shivam Kr 6 years, 5 months ago

CBSE > Class 11 > Mathematics

3 answers

❤ 753 6 years, 5 months ago

Tan300 = tan(270+30) = -cot30 = -√3

Govind Agrawal ?????????? 6 years, 5 months ago

-√3

Shivam Kr 6 years, 5 months ago

How to find this ??

ANSWER

(Cos2x-cos6x)(cos2x+ 6x)=sin4x sin8x

Posted by Tapeshwar Gupta 6 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Cos11° + sin11°\cos11°-sin11°=tan56°

Posted by Rohan Saini 6 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

1marks

Posted by Gayu Chandru 6 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Sin square A + sin square bracket mein A minus 5 by 3 + sin square bracket A + 5 by 3 bracket close is equal to 3 by 2

Posted by Sneha Dubey 6 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Excercise 1.1

Posted by Aarohi Tembhurkar 6 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

1×2+2×3+3×4+4×5.................. Find the sum to n terms of each of the series

Posted by Om Singh 6 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Between 1and 31,m numbers have been inserted in such a way that the resulting sequence is an AP and ratio of 7th and( m-1 )th numbers is 5:9 find the value of m

Posted by Saiprashanth S 6 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Cossquarex+cossquare(x+π\3)+cissquare(x_π\3)=3/2

Posted by Karan Gadariya 6 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Sumit Choudhary 6 years, 5 months ago

X2 +3pie

ANSWER

Tan60+tan30

Posted by Kanchan Maji 6 years, 5 months ago

CBSE > Class 11 > Mathematics

4 answers

Yashpal Negi 6 years, 5 months ago

4/√3

Rajeev Choudhary 6 years, 5 months ago

Tan60= √3 and Tan30 =1/√3

Yash Goswami????? 6 years, 5 months ago

Ya its 4/underoot 3

Varun Panchal 6 years, 5 months ago

4/✓3

ANSWER

Triangle ABC is an isosceles triangle such that AB= AC , D is a point on side AB such that BC = CD . Given triangle ABC = 28° find value of triangle DCA

Posted by Divi Joshi 6 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

(1+cotx + tanx)(sinx - cosx)÷ sec^3 x - cos^3 x = sin^2 x cos^2 x

Posted by Prathamesh Desai 6 years, 5 months ago

CBSE > Class 11 > Mathematics

2 answers

Harsh Mishra 6 years, 5 months ago

=(sinx.cosx + 1)/(1+cosx.sinx)×(sinx.cosx)
=sinx.cosx
=R.H.S
Hence,Proved.
{ I have used the identity.
}

Harsh Mishra 6 years, 5 months ago

ANSWER

To prove 7+77+777+...+n= 7/18(10^n+1-9n-10) Principle induction

Posted by Neha Solanki 6 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Find the domain and range of: f(x)=|x-1|÷x-1

Posted by Gowri Nandana.P.S 6 years, 5 months ago

CBSE > Class 11 > Mathematics

2 answers

Rajeev Choudhary 6 years, 5 months ago

Domain = Range = All real number

Yuvraj Singh 6 years, 5 months ago

Domain = R Range = R -ve

ANSWER

i(Iota) ki power 2019

Posted by Vikas Kumar 6 years, 5 months ago

CBSE > Class 11 > Mathematics

4 answers

Yash Goswami????? 6 years, 5 months ago

???what a questuon

Vikas Kumar 6 years, 5 months ago

How

Ananya Sharma 6 years, 5 months ago

Its answer is=-1

Manan Aggarwal?? 6 years, 5 months ago

i^2019 = -i

ANSWER

Integration of root sinx

Posted by Riyaz Ahmad 6 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Vikas Kumar 6 years, 5 months ago

-2SinX pe power -1/2 =-2(-COSX*1/2) =cosX

ANSWER

What is trignometery

Posted by Akash Tiwari 6 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Sia ? 6 years, 5 months ago

Trigonometry is a branch of mathematics that studies relationships between side lengths and angles of triangles.

ANSWER

Cbse class 10 compartment result 2019

Posted by Thai Kamdong Bhai Kamdong 6 years, 5 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Write in set builder form (_3'0)

Posted by Ravi Rapria 6 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Parshant Yadav 6 years, 5 months ago

3,2,1 =6

ANSWER

Tan69 + tan66/1-tan69tan66=-1

Posted by Cutie Patidar 6 years, 5 months ago

CBSE > Class 11 > Mathematics

3 answers

Vikas Kumar 6 years, 5 months ago

Solved :- Tan(69+66)=Tan135 =-1

Vikas Kumar 6 years, 5 months ago

Bhai tera question wrong hai (Tan69+Tan66)/(1-Tan69*Tan66) = -1

Yuvraj Singh 6 years, 5 months ago

Tan69 +tan66/1-tan69tan66 = tan (69+66) =tan135 =tan(90+45) = -tan45 =-(1) =-1

ANSWER

Tan/ SEC-1 - SIN/ 1+COS = 2COT

Posted by Ayush Agrawal 6 years, 5 months ago

CBSE > Class 11 > Mathematics

2 answers

Vikas Kumar 6 years, 5 months ago

Bhai ''angle" kaha hai

Ayush Agrawal 6 years, 5 months ago

0

ANSWER

Why sin 5pi/ 3 gives -√3/2 rather than giving √3/2

Posted by Genius Guy 6 years, 5 months ago

CBSE > Class 11 > Mathematics

2 answers

Vikas Kumar 6 years, 5 months ago

Sin 5pi/3 = sin(300) =Sin(360-60) =-Sin60 = -√3/2

S D 6 years, 5 months ago

sin5pi/3 =sin300°= sin(360-60) =sin(-60)=-sin60 = -√3/2

ANSWER

99+4577580432478

Posted by Anjali Anjali 6 years, 5 months ago

CBSE > Class 11 > Mathematics

2 answers

Ashish Sah 6 years, 5 months ago

4577580432577

Yogita Ingle 6 years, 5 months ago

99 + 4577580432478 = 4577580432577

ANSWER

find the angle between power hand and minute hand at 4:45?

Posted by Kunal Lodha 6 years, 5 months ago

CBSE > Class 11 > Mathematics

1 answers

Sindu Reddy 6 years, 5 months ago

25 degree

ANSWER

How many has taken non medical

Posted by Nidhi Sharma 6 years, 5 months ago

CBSE > Class 11 > Mathematics

2 answers

Aman Chand 6 years, 5 months ago

India is the second largest country where doctor and engineer are made

Sumit Kumar 6 years, 5 months ago

I know

ANSWER

If U ={x:x<_10,x€N} A={x:x€N and x is prime} B={x:x€N is even} Find (A intersection B) in roster form

Posted by Muttu Raj Naik 6 years, 5 months ago

CBSE > Class 11 > Mathematics

2 answers

Yashpal Negi 6 years, 5 months ago

{2}

Ashutosh Kumar 6 years, 5 months ago

A=2,3,5,7 B=2,4,6,8 Then, A intersection B =(2)

ANSWER

Write the following sets in roaster form c={x:x is a two digit natural number such that sum of its digit is 8}

Posted by Prabhjot Kaur 6 years, 5 months ago

CBSE > Class 11 > Mathematics

2 answers

Sindu Reddy 6 years, 5 months ago

Same the above

Ashutosh Kumar 6 years, 5 months ago

Sum of the digits are =(17,26,35,44,53,62,71,80

ANSWER

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