maths
Popular questions and responses by maths
trigonometry
A tree is broken over by the wind. It forms a right angled triangle with the ground. If the broken part makes an angle of 60° with the ground and the top of the tree is now 20m from its base, how tall WAS the tree?
asked on March 26, 2016 
TRIGONOMETRY
Express tan theta in terms of cosec theta
asked on March 26, 2016 
plz plz help me belive me have tried
cosx+cosy=a and sinx+siny=b show that sin2x+sin2y=2ab(1(2/(a^2+b^2)) plz plz show step
asked on November 2, 2016 
Maths
The temperature at 6pm of town was 37 degree c at mid night the temperature was 31 degree c if the rise in temperature per hour
asked on July 3, 2017 
Math
Simplify: 3√108a^4 b^3
asked on June 29, 2018 
MATHS
A girl start at A and walks 2km south to B. she then walks 3km west to C. find the distance and bearing of C from A
asked on May 14, 2018 
Maths
The Ratio Of The 2nd Term To The 7th Term Of An A.P Is 1:3 And Their Sum Is 20.Calculate The Sum Of The 1st Terms Of The G.P
asked on April 25, 2016 
maths
i am a two digit number above 50. the sum of my digits is 12. and the difference of my digits is 4. who am i?
asked on April 13, 2014 
sir damon plz help me or steve
An ac source of 50v,100÷πHz is connected in series with an inductor of inductance L ad a resistor of resistance R.the current in the circuit is 2A ad p.d. across L and R are 30v ad 40v respectively 1) calculate the average power dissipated ? (2)
asked on November 3, 2016 
Maths
A man spends 3/8 of his money and still has rupees 720 with him. How much money did he have at first.
asked on October 21, 2019 
math
The length of a room is double its breath. Its height is 5m the area of four walls ( including the door and windows) is 210sq m. Find its volume solve this sum
asked on November 21, 2017 
Venn Diagram
In a class of 40 student,the number of student who study french is 10 more than the number of student who study history.if 8 student study both french and history,how many student study (1)history (2) french
asked on October 10, 2016 
math
prove that the value of cosx + secx can never be 3/2.
asked on April 30, 2015 
maths
f(x)=x ^2 +bx+c , b and c real .Find the minimum of (maxf(x))for x∈[−10,10]?
asked on July 2, 2013 
Maths
Please show me the way of using formula log?
asked on October 14, 2011 
TRIG..............
Q.1 Prove the following identities: (i) tan^3x/1+tan^2x + cot^3x/1+cot^2 = 12sin^x cos^x/sinx cosx (ii) (1+cotx+tanx)(sinxcosx)/sec^3xcosec^3x = sin^2xcos^2x.
asked on June 10, 2011 
Math
1/2,3/2 and 6/2 find the value
asked on June 11, 2019 
Maths
John is FIVE years older than Peter.Twice the product of their ages FIVE years ago is 100 more than product of their present ages.Find the present ages of John and Peter.
asked on May 20, 2019 
Maths
SAMUEL IS 5 YEARS OLDER THAN HIS BROTHER .THE SUM OF THEIR AGES IS 33.WRITE A MATHEMATICAL EQUATION?
asked on September 28, 2017 
math
Two no which have same digit their sum is 9and difference is 27what will be the nos
asked on February 7, 2017 
MATH
HOW MANY QUATERS KG CAN BE MADE FROM 15 KG ?
asked on January 25, 2017 
Maths
Q. a^4  13a^2 + 36 Factorise
asked on November 22, 2016 
Math
The sides of a rectangle are in the ratio4:5.by what fraction should the shorter side be increaaed tomake it a square
asked on November 17, 2016 
Maths
1^2014 + 2^2014 + 3^2014 + 4^2014 + 5^2014 divided by 5, remains ______
asked on November 13, 2016 
physics damon help
An ac source of 50v,100÷πHz is connected in series with an inductor of inductance L ad a resistor of resistance R.the current in the circuit is 2A ad p.d. across L and R are 30v ad 40v respectively 1) calc d average power dissipated 2) calc d power
asked on November 3, 2016 
MATHS
1) For how long must an investment be left at 5.5% p.a compounded yearly for the initial amount to double?
asked on September 18, 2016 
value
in a class 7 2 fifthy were girls ,27were boys ,how many girls were there
asked on July 28, 2016 
maths
a rectangular courtyard is 57 cm 50 cm long and 22 m . determine the least possible number of square stones of the same size required to pave it.
asked on July 16, 2016 
math
if the papers of 4 students are checked by any of the 7 teachers, then the probability that all the 4 papers are checked by exactly 2 teachers is?
asked on April 30, 2016 
math
an urn contains 2 white and 2 black balls. a ball is taken at random. if the ball is white then it is not replaced otherwise it is replaced along with another ball of the same colour. find the probability that the third ball drawn is black.
asked on April 29, 2016 
Math
Paulo and sergio buy a pizza.paulo eats 1/3 of the pizza and sergio eats two fifths.how much of the pizza is left over?
asked on February 17, 2016 
Maths
Solve For X And Y 2x4y=3
asked on January 11, 2016 
maths
if A and B are in ratio 3:4 and B and C in 12:13,then A and C will be
asked on September 27, 2015 
maths
. 30 girls and boys have planned for a picnic. There is a ratio of 3 girls to 7 boys. How many boys are there?
asked on September 27, 2015 
speed time distance
a train running at the speed of 180 km hr crosses a 365 meter long platform in 21sec. what is the length of the train
asked on June 8, 2015 
Lara
Alice has 4 times as much money as Benny. If Benny has $36 less than Alice, how much money do they have altogether? A $45 B $48 C $60 D $180
asked on January 18, 2014 
Maths
Is given a function: f(x)=x2 + px + q Prove that: f(x+1) + f(x1)= 2+2 f(x)
asked on August 20, 2013 
maths
A factory produces two products A and B using raw materials p and q. It uses 3 units of p and 1 unit of q to produce one unit of A. It uses 1 unit of p and 2 units of q to produce one unit of B. The maximum daily supplies are 330 units of p and 220 units
asked on July 9, 2013 
maths
A subset S of {1,2,…,n} is said to be packed if whenever i,j∈S the number ⌊(i+j)/2⌋ is also in S. Determine how many subsets of {1,2,…,25} are packed. Details and assumptions i and j need not be distinct. If i=j is in the set, then clearly so is
asked on July 9, 2013 
physics
The efficiency of a machine is in general defined as the ratio between useful (released) energy and the input energy. Therefore, the exact formulas for efficiency depend on the purpose of the machine. What's the difference in the maximal efficiency of a
asked on July 9, 2013 
maths
Suppose p(x)=ax^2+bx+c is a quadratic polynomial with real coefficients and p(x)≤1 for 0≤x≤1. Find the largest possible value of a+b+c.
asked on July 9, 2013 
maths
Find the smallest n such that for any prime p, at least 20 numbers 1,2, ..., n are quadratic residues not modulo p. k is quadratic residue modulo p if there exists an integer j such that j^2 ≡ k (mod p).
asked on July 2, 2013 
maths
There are N ordered integer quadruples (a,b,c,d) subject to 0≤a,b,c,d≤99990 such that ad−bc≡1(mod99991). What are the last three digits of N?
asked on April 6, 2013 
statistics
A computer course is conducted for 24 days.Each day 48 persons attended the course.To prepare a day wise work done sheet for all 24 days,find the estimated and the actual number of persons attended the course.Is the estimated value more or less than the
asked on October 25, 2011 
question (doubt)....
solve to find x and y: x^3+8y^3+x+2y=0
asked on June 11, 2011 
trigonometry...........
Prove the following identity: (i) tan^3x/1+tan^2x + cot^3x/1+cot^2 = 12sin^x cos^x/sinx cosx
asked on June 11, 2011 
MATHS......
solve the following. 1) x^3+3y^3+x+2y
asked on June 10, 2011 
MA
a) find the equation of AB, the perpindicular bisector of the line joining the points P(3,1) and Q(1,9) (line AB intersects the point at midway of PQ) b) C is the centre of a circle passing through P and Q. given that QC is parralel to the yaxis,
asked on January 18, 2010 
maths
a) find the equation of AB, the perpindicular bisector of the line joining the points P(3,1) and Q(1,9) (line AB intersects the point at midway of PQ) b) C is the centre of a circle passing through P and Q. given that QC is parralel to the yaxis,
asked on January 17, 2010 
general maths
A study of motor vehicle rates in the 50 states reveals that traffic death rates (deaths per 100 million motor vehicle miles driven) can be modeled by the normal curve. The data suggest that the distribution has a mean of 5.3 and a standard deviation of
asked on September 7, 2009 
Maths
a tray holds 2.3 liters of water when full (2300 cm3) Calculate the height (h cm) of the tray Tray = L=15cm B=20cm H=?
asked on June 14, 2009 
math
given that a/b=c/d, decide whether it is true or not that a/c=b/d. and how can i explain my reasoning?
asked on May 26, 2009 
math
are all regular hexagons similar? how can i explain?
asked on May 26, 2009 
TP
What is Standard Deviation? As in what does it measure, is it a measure of spread of a graph of results?
asked on May 29, 2008 
K
(a) Find the indeﬁnite integrals of the following functions. (i) f (t) = 6 cos(3t) + 5e^−10t (ii) g(x) = 2112x^3/ x (x > 0) (iii) h(u) = cos^2( 1/8 u) (b) Evaluate: (this big F sign at the start, 5 at the top and 1 at the bottom) 5 1/4x (7 + 6x^2) dx
asked on March 24, 2008

Maths
Sjkgksgz(gzhkznzcCKnsjwokamx. Xbnaoakdmmfdldllxkxmxbfkelwlz
posted on November 28, 2019 
French
is musculine or feminine
posted on August 4, 2017 
math
The product of two numbers is 504347 .If one of the number is 317.Find hte other number
posted on June 27, 2017 
plz plz help me belive me have tried
how did sin(x+y)=2sinxsiny is it not suppose to be sin(2x)
posted on November 2, 2016 
math
maths
posted on May 16, 2016 
math
16x+8x+4x^216x+20+10+5x20therefore 4x^2+8x+5x+10 4x^2+13x+10
posted on August 24, 2014 
math
a sack contain 10 blue and 6 red crayons another sack contains 9 blue and 12 red crayons two crayons are drown at random without replacement from each sack. what is the probability that all the four crayons are blue? exactly one of the four crayons is red
posted on July 7, 2014 
Maths
You shouldn't be asking for help in the maths challenge. It is against the rules.
posted on June 15, 2014 
unscrambling word
mbicned
posted on September 6, 2011 
math
thank you
posted on May 26, 2009 
math
thank you
posted on May 26, 2009 
goemetry
thnx
posted on May 26, 2009