# Venkatesh

Newest questions and responses by Venkatesh
1. ## math

Average of 4 dates marked in calender 4,5,6,10 how do u write method wise

asked on July 25, 2016
2. ## Progression

if a , b ,c are in AP x , y , z are in GP . Prove that (x^b/x^c)× (y^c/y^a)× (z^a/z^b)=1

asked on March 27, 2016
3. ## trigonometry

2sin^2 A + 5cosA = 4 , Prove that cos A = 1/2

asked on March 23, 2016
4. ## MATHS GP

IN A GP if the sum of 2nd and 4th terms is 30 . The difference of 6th and 2nd term is 90 . Find the 8 the term I got r = √13/2 Is it correct? Pls answer

asked on March 23, 2016
5. ## trigonometry

x×sin^3A=y , cos^3A = sinA × cosA , x×sinA= y×cosA , then prove that x^2+ y^2= 1 I have no idea

asked on March 23, 2016
6. ## Combination

In a question paper there are two parts A and B . Part A contains 6 questions and part B contains 7 questions . in how many ways a student can select 4 questions in part A of which 2 questions are compulsory and 5 questions in part B of which 3 questions

asked on March 23, 2016
7. ## Geometric progression

sum of 4 terms of g p is 30 & sum of first and last term is 18 . Find gp a(r^4-1)/(r-1) = 30 a + ar^3 = 18 a(1+r^3) = 18 it's easy to see that if a=2, r=2 Does that work on S4? 2*15/1 = 30. Yes So, the GP is 2,4,8,16,... But sir I want not logic proof ,

asked on March 23, 2016
8. ## trigonometry

tanA - sin A /sin^2A= tan A / 1 + cosA Please prove this

asked on March 22, 2016
9. ## Arithmetic progression

In an AP , Sn = 2n , S2n = n Find S4n

asked on March 22, 2016
10. ## math

sum of 4 terms of g p is 30 & sum of first and last term is 18 . Find gp

asked on March 22, 2016
1. ## Science

Clinical thermometers have a kink but laboratory thermometers have a wide range

posted on September 13, 2017
2. ## Weather & Climate (science)

Barometer

posted on September 13, 2017
3. ## Bps science

Yes it's right after electrolysis hydrogen and oxygen become separate and everybody will call it as a physicalchange but it's wrong when it's vaporised hydrogen becomes H2 oxygen becomes O2 it can't be formed as water again so it's a chemical change

posted on September 13, 2017
4. ## Progression

How please explain i am beginner to this type problems

posted on March 27, 2016
5. ## Combination

posted on March 24, 2016
6. ## MATHS GP

I got the answer

posted on March 23, 2016
7. ## Math

Good effort But answer is wrong 540 minutes= 9 hours 9×65 = 585 581 is answer

posted on March 23, 2016
8. ## Maths

Take LCM of 14 and 8 That is 56 . After 56 days they will fill tank again Hope you understand Comment it

posted on March 23, 2016

Make achievement

posted on March 23, 2016
10. ## trigonometry

Thanks reiny sir

posted on March 23, 2016
11. ## math

Please give the answer in lengthy way and full maths but sir you solved this logic

posted on March 22, 2016
12. ## maths-TRIGNOMETRY

1/32(cos6a-cos2a-2cos4a+2) let us find the value of cos6a-cos2a-2cos4a+2 by applying the formula cos c-cos d = 2sin(c+d/2)sin(d-c/2) =2sin4a(sin(-2a)-2cos4a+2 =-2sin4asin2a-2cos4a+2 =2(1-cos4a-sin4asin2a)

posted on May 19, 2013
13. ## physics

1m+(2*0.95m)+(2*0.9m)+(2*0.8m)+...+(2*.05m)+0 2m (2000cm)

posted on December 22, 2011