Venkatesh
Most popular questions and responses by Venkatesh
trigonometry
tanA  sin A /sin^2A= tan A / 1 + cosA Please prove this
asked on March 22, 2016 
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 
trigonometry
2sin^2 A + 5cosA = 4 , Prove that cos A = 1/2
asked on March 23, 2016 
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 
Arithmetic progression
In an AP , Sn = 2n , S2n = n Find S4n
asked on March 22, 2016 
Geometric progression
sum of 4 terms of g p is 30 & sum of first and last term is 18 . Find gp a(r^41)/(r1) = 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 
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 
math
Average of 4 dates marked in calender 4,5,6,10 how do u write method wise
asked on July 25, 2016 
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 
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

Science
Clinical thermometers have a kink but laboratory thermometers have a wide range
posted on September 13, 2017 
Weather & Climate (science)
Barometer
posted on September 13, 2017 
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 
Progression
How please explain i am beginner to this type problems
posted on March 27, 2016 
Combination
How please explain
posted on March 24, 2016 
MATHS GP
I got the answer
posted on March 23, 2016 
Math
Good effort But answer is wrong 540 minutes= 9 hours 9×65 = 585 581 is answer
posted on March 23, 2016 
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 
Readers
Make achievement
posted on March 23, 2016 
trigonometry
Thanks reiny sir
posted on March 23, 2016 
math
Please give the answer in lengthy way and full maths but sir you solved this logic
posted on March 22, 2016 
mathsTRIGNOMETRY
1/32(cos6acos2a2cos4a+2) let us find the value of cos6acos2a2cos4a+2 by applying the formula cos ccos d = 2sin(c+d/2)sin(dc/2) =2sin4a(sin(2a)2cos4a+2 =2sin4asin2a2cos4a+2 =2(1cos4asin4asin2a)
posted on May 19, 2013 
physics
1m+(2*0.95m)+(2*0.9m)+(2*0.8m)+...+(2*.05m)+0 2m (2000cm)
posted on December 22, 2011