# Maths, find the Exact Value

posted by .

have to find the exact value(so in fraction form.. like 1231231/41231 or something) of 2/3 + 3/4 - 2/11 - 5/21

I'm unsure of the working

• Maths, find the Exact Value -

2/3 + 3/4 - 2/11 - 5/21
3*4*11*7 = 924, so if we use that as our common denominator, the numerators add up to:

2*(4*11*7) + 3*(3*11*7) - 2*(3*4*7) - 5*(4*11) = 921

921/924 = 307/308

## Similar Questions

1. ### trig/pre -calc

hello, i don't quite understand how to do this type of problem: 1. find the exact value of sin (pi/3). even more confusing is 2. find the exact value of csc^-1 (1). i would appreciate any kind of help! thank you!
2. ### Math

Find the exact value of sin(pi/24) So like i need like the value like sqrt3/2 but for pi/24... also if you could show me the steps so i could figure the rest out, that would be cool
3. ### Math

Find the exact value of sin(pi/24) So like i need like the value like sqrt3/2 but for pi/24... also if you could show me the steps so i could figure the rest out, that would be cool
4. ### Algebra II

1) Find the exact value of cos theta if the terminal side of theta in standard position contains the point (6,-8). Answer: 3/5 2) Find the exact value of sin(-pi/6). Answer: -1/2 Thanks
5. ### Trignometry questions EASY HELP

1. Which is a solution to the equation below?
6. ### math

An initial-value problem is given by the differential equation, f(x,y) = x + y, y(0) = 1.64 The Euler-midpoint method is used to find an approximate value to y(0.1) with a step size of h = 0.1. Then use the integrating factor method, …
7. ### Math

I have to find the exact value(so in fraction form.. like 1231231/41231 or something) of a^4b^2/c^2 , a = (2/5)^2, b = (8/5)^5 c= (4/5)^10 I'm honestly not sure how to get around to doing it with working
8. ### Trig hep, please? Thank you!

1. Find the exact value of sin(195(degrees)) 2. If cot2(delta)=5/12 with 0(<or =)2(delta)pi, find cos(delta), sin(delta) , tan(delta). 3.find the exact value of sin2(x) if cos(x)= 4/5. (X is in quadrant 1) 4. Find the exact value …
9. ### calculus

i am on "rolles and the mean value theorem" and was just wondering, when i am doing rolles, do i really need to find the exact value of x where f'(c) = 0?
10. ### pre-calculus

find the exact value of sin 112.5 in fraction form

More Similar Questions