Venkatesh

Most popular questions and responses by Venkatesh
  1. trigonometry

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

    asked on March 22, 2016
  2. 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
  3. trigonometry

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

    asked on March 23, 2016
  4. 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
  5. Arithmetic progression

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

    asked on March 22, 2016
  6. 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
  7. 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
  8. math

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

    asked on July 25, 2016
  9. 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
  10. 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
  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

    How please explain

    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
  9. Readers

    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