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

sin20. sin 40. sin60. sin80

=> sin60[sin20.sin40.sin80]

=>√3/2[sin20.sin(60-20).sin(60+20)]

=>√3/2[sin 3(20)/4]

=>√3/2[sin 60/4]

=>√3/2[√3/2*4]

=>√3/2*√3/8

=3/16

2Thank You

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{x: x+5=5}={0} true or false

Posted by Kiran Sharma 6 years, 8 months ago

CBSE > Class 11 > Mathematics

1 answers

M.D. Sharukesan 6 years, 8 months ago

True

1Thank You

ANSWER

Find the range f of x is equal to underoot 9 minus x square

Posted by Rahul Kawatra 6 years, 8 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

The set (AUB')'U(B∩C) is equal to?

Posted by Akash Hazra 6 years, 8 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

If (A union B) = (A union C) and (A intersection B) = (A intersection C) prove B=C

Posted by Yash Goswami????? 6 years, 8 months ago

CBSE > Class 11 > Mathematics

2 answers

Yash Goswami????? 6 years, 8 months ago

0Thank You

Gaurav Seth 6 years, 8 months ago

n(A U B) = n(A U C) …….1

n(A ∩ B) = n(A ∩ C)………2

Expanding equation 1

n(A) + n(B) — n( A ∩ B) = n(A) + n(C) — n(A∩C)…3

Substituting 2 in equation 3

n(A) + n(B) — n(A∩B) = n(A) + n(C) — n(A∩ B)

Therefore n(B) = n(C)

1Thank You

ANSWER

When result will come

Posted by Mr Topper 6 years, 8 months ago

CBSE > Class 11 > Mathematics

5 answers

Yash Goswami????? 6 years, 8 months ago

Results will come in the 2nd week of may anytime

1Thank You

Pankaj Prajapati 6 years, 8 months ago

On 6 may , may be

0Thank You

Ranjeet Kumar 6 years, 8 months ago

Mr "Topper" ,CBSE confirms that the date and time of class 10 results will be a surprise,but before 11 May.Results NOT TODAY.

0Thank You

Devil ? 6 years, 8 months ago

2 week of may

1Thank You

G G 5 years, 9 months ago

When you will die

1Thank You

ANSWER

What is superset.

Posted by Harsh Chaurasiya 6 years, 8 months ago

CBSE > Class 11 > Mathematics

3 answers

Yash Goswami????? 6 years, 8 months ago

Superset is just opposite to subset

1Thank You

Ranjeet Kumar 6 years, 8 months ago

If A is a subset of B,then B is superset of A.

0Thank You

Krishna Priya 6 years, 8 months ago

superset of A contains all the elements of A

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ANSWER

Show that for any set A and B, A=(A intersection B) union (A-B) and A union (B-A) = (A union B)

Posted by Yash Goswami????? 6 years, 8 months ago

CBSE > Class 11 > Mathematics

1 answers

Ranjeet Kumar 6 years, 8 months ago

We have (A intersection B)union(A intersection B') ,since( A -- B)=A intersection B'. ==>A intersection (B union B'), by distributive law . ==>A intersection U ,as B union B'=U(union set). ==>A. Also,we have A union (B -- A) ==>A union (B intersection A') ==>(A union B ) intersection (A union A') ==>(A union B) intersection U ,since A union A'=U ==>A union B

2Thank You

ANSWER

Is chapter wise questions are available

Posted by A Singh Life 6 years, 8 months ago

CBSE > Class 11 > Mathematics

1 answers

Yash Goswami????? 6 years, 8 months ago

Yes bro

0Thank You

ANSWER

Find amplitude of z =(1+i)

Posted by Malik Chand Sapra 6 years, 8 months ago

CBSE > Class 11 > Mathematics

1 answers

G G 6 years, 8 months ago

Bbb

0Thank You

ANSWER

Posted by Arpit Yadav 6 years, 8 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Product of the roots of the Z^2 - z = 5 - 5i

Posted by Gurvir Mann 6 years, 8 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

(Root 5+7 oita) ( root 5 - 7 iota)^3

Posted by Dhaliwal Gagan 6 years, 8 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

Sorry.................. Please forgive me dhama Yaar ???????????

Posted by Kapil Gurjar (गुर्जर) ??? 6 years, 8 months ago

CBSE > Class 11 > Mathematics

1 answers

G G 6 years, 8 months ago

Sala...

0Thank You

ANSWER

In a survey it was found that 21 people liked product A, 26 liked product B and 29 liked product C. If 14 liked products A and B, 12 people liked C and A, 14 people liked products B and C and 8 liked all the three products. Find how many liked product C only?

Posted by Aryan Singh 6 years, 8 months ago

CBSE > Class 11 > Mathematics

0 answers

ANSWER

If A, B, C are any 3angles then find the value of sin[B+C]/cos A.cos B+sin[C-A]/Cos C.Cos A+Sin[A-B]/Cos A. cos B

Posted by Raghavendra B N 6 years, 8 months ago

CBSE > Class 11 > Mathematics

1 answers

Ranjeet Kumar 6 years, 8 months ago

We have (sinB cosC + cosB sinC)/cosA cosB +(sinC cosA -- cosC sinA)/cosC cosA+(sinA cosB -- cosA sinB)/cosA cosB ==>(sinB cos^2 C +sinC cosB cosC +sinC cosA cosB -- sinA cosB cosC +sinA cosB cosC -- sinB cosA cosC)/cosA cosB cosC ==>{sinB cos^2C + sinC cosB(cosA + + cosC) -- sinB cosC cosA}/cosA cosB cosC ==>{ sinBcosC (cosC -- cosA)+ sinC cosB (cosA + cosC )}/ cosA cosB cosC YOU MUST CHECK YOUR QUESTION, IF IT IS CORRECT OR NOT. ALSO YOU CAN VERIFY THIS SOLUTION .

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ANSWER

What is the mean of tengram

Posted by Sunil Jain 6 years, 8 months ago

CBSE > Class 11 > Mathematics