# Rabin

Popular questions and responses by Rabin
1. ## Math

if vectors a+2b and 5a-4b are perpendicular to each other and a and b are unit vectors. Find the angle between a and b.

2. ## maths

solve: tanx+tan2x+√3tanx tan2x=√3 (0

3. ## Science

if a strong odour is smelt continuously for some time the sensation of smell of that substance weakness why?

4. ## Math

If 1/sinA+1/cosA =1/sinB+1/cosB, prove that: cot(A/2+B/2) = TanA. TanB

5. ## Math Vector

ABCDEF is a regular hexagon. Show that vecotr AB+AC+AD+EA+FA=4AB

6. ## Maths Vector

ABCDEF is a regular hexagon. Show that vecotr AB+AD+FA+EA=3AB

7. ## Maths Vector

ABCDEF is a regular hexagon. If AB=a,BC=b,express vector,AD AND AE in terms of a and b.

8. ## Math

P and Q are two points on the line x-y+1=0 and are at a distant of 5 units from the origin. Find the area of triangle POQ.

9. ## Math

In ∆ABC,D and E divides AB and AC in the ratio of 1:2 respectively. Prove that Vector DE=1/3BC.

10. ## Opt math

Prove :Tan20+4sin20=square root 3

11. ## Math Vector

ABCDEF is a regular hexagon. Show that vecotr AB+AD+FA+EA=3AB

12. ## Maths

Prove: 1+(TanA/SinB)^2/1+(TanA/SinC)^2 = 1+(SinA/TanB)^2/1+(SinA/TanC)^2

13. ## Math Vector

In ∆ABC, OA=3i-5j, OB=-7i+4j and the position vector of centroid G is 2i+j. Find OC.

14. ## Opt math URGENT

prove that : cos^3(θ)sin^2(θ)=1/16[2cos(θ)-3cos(θ)-5cos(θ)]

15. ## maths

Prove: sin^212+sin^221+sin^239+sin^248=1+sin^29+sin^218

16. ## maths

solve for x: cosecX+secX=2Square root 2

17. ## Maths algebra

Solve: 66x^3+5280x^2-56847=0

18. ## Maths

A shopkeeper has false balance. It weighs 10% profit when buying goods and weighs 10% loss when selling goods. Find the profit and loss percent by weighing?

19. ## Maths

Solve for: 4^x+4^(1/x)=18

20. ## math

if A+B+C=π prove that sin(B+2C)+sin(C+2A)+sin(A+2B)=4sin(B-C)/2 sin(C-A)/2 sin(A-B)/2

21. ## Maths

Some amount of money is distributed to a some students equally. If the number of student is decreased by 10 then they will get 20 rupees more. If student is increased by 10 then they will get 4 rupees less. Find the amount and number of student?

22. ## Math

If vector OA=4i+2j ,OB=6i-8j and OC=-2i+5j then find the value of

23. ## Math

Solve: (1-√3tanθ)+1+√3 = √3sec^2θ Where (0≤θ≤360)

24. ## Math

If m th tern of the geometric sequence is 1/n and n th term is 1/m then show that sum of first term s(mn)=1/2 (mn+1).

25. ## Math

Solve:(a+x)^2/3+(a-x)^2/3=3(a^2-x^2)^1/3

26. ## science

why ac current has variable frequency and voltage? I din't understand about hertz. please make me clear about it?

27. ## Math urgent

X,Y and Z can do a piece of work in 15 days. If X takes twice as much as Y and Z together and Y takes thrice as much as X and Z together, how long days will each take to finish a work.

28. ## Maths

Prove that:sin(x+2y)+sin(y+2z)+sin(z+2x)=4sin(x-y)/2sin(y-z)/2sin(z-x)2

29. ## Math

In what ratio the line segment AB divided by P where, OA= 4i+2j, OB=18i+4j and OP=8i+4j.

30. ## Math

In ∆ABC, AD median of BC where position vectors of A and D are 3i-2j and -3i-4j respectively. Find the position vector of centroid G of the ∆ABC.

31. ## physics

A body is thrown with initial velocity 50ms-1 at the angle 60• With the horizontal. Calculate the horizontal range ,also calculate what another angle achieve the same?

32. ## Math

If m th term of the geometric series is 1/n and n th term is 1/m then show that sum of first (mn) th term of this series is 1/2 (mn+1).

33. ## Math

If vector OA=4i+2j ,OB=6i-8j and OC=-2i+5j then find the value of

34. ## Maths

X,Y and Z can do a piece of work in 15 days. If X takes twice as much as Y and Z together and Y takes thrice as much as X and Z together, how long days will each take to finish a work.

35. ## Science

What do you mean by resultant vector?

36. ## Science

which part of the tongue is stimulated by more temperature? Explain.

37. ## Maths urgent

4^x+4^(1/x)=18

1. ## Math urgent

Find two separate equation of x^2+2xy+y^2-2x-2y-15=0

posted on September 5, 2016
2. ## Maths

How to solve two variable in one time please.. Help me

posted on July 9, 2016
3. ## Maths Vector

ABCDEF is a regular hexagon. Show that vecotr AB+AD+FA+EA=3AB

posted on March 12, 2016
4. ## Math

If m th term of the geometric series is 1/n and n th term is 1/m then show that sum of first (mn) th term of this series is 1/2 (mn+1).

posted on February 27, 2016