Mathematics

Trigonometry Question

I need some help with the following trigonometry question: Two points X and Y are separated by a swamp. To find the distance between them, Kelly walked 150 m from X to another point Z. Then she estima

How does one use Linear Independent Vectors to satisfy a vector equation with Alpha and beta constants

Hey Everyone, Ive got my Uni exams next week and Im totally lost with this idea revolving around Linear Independence, could someone point me towards an easy explanation or better yet just post the ex

Algebraically show that f(x) = sin(x) and g(x) = cos(x) intersect at x = π/4

thanks-Substitute π/4 at both functions. sin (π/4) = √(2)/2 cos (π/4) = √(2)/2 Since the resulting values are equal, then the two functions intersect at x = π/4.-f(x) and g(x) will intersect at a p

Intergation by parts - tricky trig question

using the substution x = cos u find the intergal of inverse cos x. using the substitution x = tanx find the intergal of inverse tan x help very much appreciated. text book says use given substitution

Forgotten how to do basic high school algebra

Hi, just brushing up. Please show how you got your answers, as the answers dont mean much to me. Thanks! 1. 5n = 25 2. -4n^2 + (3n)^2 3. n^3 - 2n^2 (n + 1) 4. x3 + x2 - 9x = 9 Once again thanks f

Need help with an algebra problem.

Part of the proceeds from a garage sale was $340 worth of $10 and $20 bills. If there were 4 more $10 bills than $20 bills, find the number of each denomination.-let $20 denomination be x, denominatio

What is the formula for Tan (A)-Tan (B)

Like Cos(A)+Cos(B)=2 Cos[(A+B)/2].Cos [(A-B)/2],what is the formula for Tan x-TanA-TanB =Tan(A-B)(1-TanATanB) = (sinAcosB-sinBcosA)/(cosAcosB) = 2sin(A-B)/[cos(A - B) + cos(A + B)]-tan(a) - tan(b) t

Divide and check please help me

Divide and check: (t^4 − 2t^2 + 4t − 5) ÷ (t^2 − 3)-t^2 - 2t^2 + 4t + 1.7-t^4-2 t^2+4 t-5 = (1+t^2)×(-3+t^2)+-2+4 t

Solve for a, b, c and d (the answers are not all 0)

a - 3b = 0 -a + 2b +2c - d = 0 b + c +d = 0 I cant seem to solve for all them, please show steps. Thanks.-You have 3 equation with 4 unknowns, so you cant possibly solve for all of them. Youd need an

Solve the system using elimination: 4x + y = 6 and 6x + y = 2

-4x - y = - 6 6x + y = 2_____ADD 2x = - 4 x = - 2 - 8 + y = 6 y = 14 x = - 2 , y = 14-Pleased to help---thank you.Report Abuse-Multiply. 2nd equation by -1 so-6x + -y=-2.then add both equations.-2x

Yr 11 math help on linear equations

given point a and point b have the coordinates of (-3,5) and (5,1) find the equation of the line that passes through the midpoint in part b and is perpendicular to the line joining points A&B from the

What is the probability of getting at least one head if you flip a coin 10 times

some simple equations and trees to help explain this would be great, thank you-A common trick is to invert so that you calculate something easier, then subtract from 1. Here, P(10 tails)=(1/2)^10 = 1

Hey, do you like math

i dont.-eww math...-What ExtremeMia said! Im only on this board because Im failing my Pre-Cal class, something Ill never need in the future. -_--Yes and no. I find it to be an easy subject, but if

Solve this word problem for me

Mr.Robert uses 2 scoops of formula for every 3oz. of water in Juilannas bottle. How many scoops are needed for 8oz. of water?-let x= the number of scoops needed for 8 oz. of water 2 scoops / 3 oz. =

Evaluate: -x^2- 3x +10 when x=-1

Evaluate: - x^2 -3x+ 10when x= - 1 ? substitute (- 1) for x... - (- 1)^2 - 3(- 1) + 10 = - 1 + 3 + 10 = 12 pay attention to signs...practice. qed--(-1)^2-3(-1) + 10 (Exponents first) -1+3+ 10 2 +