Mathematics

How do I eliminate the parameter (t) from x(t)=sint and y(t)=cos(2t) and rewrite it as y=f(x)

I think I can use the trig identity cos2θ=cos^2(θ)-sin^2(θ) but Im not sure how to manipulate it.-You are on the right track. Use: cos(2θ) = 1 - 2sin^2θ. This follows from your identity and the fact

Half-Angle Trigonometry Question

Find the exact value of sin (w/2), cos (w/2), and tan (w/2) using the half-angle formulas WITH the following data: sin w = (12/13), pi/2 I already have the answer, but I do not know how to do the pro

Someone please HELP ME WITH THIS MATHS! year 6 maths

its for a book thing i have to write , i need some help! Expand and simplify the following: (show working) even if you can just do a couple.. much appreciated ! a) 2(x-5) b) 2(3x+1) c)5(2x-3)+4(5x+2

Must the last row of a Reduced Echelon Form matrix always be all zeroes

Can the last row of a Reduced Echelon Form matrix be not of all zeroes and still called as a Reduced Echelon Form? If everything in the matrix are reduced properly and nicely, just that last row isnt

What would the rule for the linear function be if the graph looks like this

Y intercept is 4. X intercept is -4. and can you help with this one? How would a graph with this table look? Under X the numbers are -2, -1, 0, 1, 2. Under Y the numbers are 0, -1, -2, -3, -4-Why n

Can you help write the rule for the function

In the table under X the numbers are -2, -1, 0, 1, 2. Under Y the numbers are 0, -1, -2, -3, -4-y=mx+b as the xs increase by one, the ys decrease by 1, so m, the slope is -1/1 =1 (0,b) =(0,-2) y=-x-2

Right Triangle w/ Angle Question

Given: A right triangle with sides of lengths 8, 15, and 17. Find the exact value of cos θ. Find the exact value of sin (θ/2). And in order to understand this problem, could you explain step-by-step

Select the set of equations that represents the following situation: Mike invested $240 for one year. He in

Select the set of equations that represents the following situation: Mike invested $240 for one year. He invested part of it at 9% and the rest at 10%. At the end of the year he earned $23.42 in inter

Double Angle Trig Question

Find the eact value of sin (2w), cos (2w), and tan (2w) using the double angle formulas. cos w = (-2/3), pi/2 Ok, I understand how to use the formulas to set up the problem, and I have the final answ

Help about limits, please

What is the limit of: (3x²+2x-1)/(9x²-1) when x->1/3? The answer is 2/3 but it doesnt the same result i did-Start out by factoring the numerator and denominator to get: (a) 3x^2 + 2x - 1 = (3x - 1)(x

Simplify a^3 + b^3 + c^3

This is generally seen as a polynomial question and in terms of alpha beta and gamma, rather than a, b and c but my book doesnt explain it AT ALL it just says its too complicated and just gives a simp

How do you find dy/dx: y= (8 radical x) + 10x - 32x + (x^2 cos2x) / x^2

Since differentation is linear, you need to calculate the derivative of each term.8Sqrt(x) = 8(x)^(1/2) Recall the power rule and this becomes 8(1/2(x^-.5)) = 4/sqrt(x).10x by the power rule is 10. -3

Real analysis problem (mathematics)

consider a set S such that S = {(x,y) such that x Heres what I have so far: any point (z,w) that belongs in the e-ball/e-neighborhood of (x,y) will be at a distance less that some small positive numb

Help me solve this math equation thanks x)

9000 = -6t^2 + 3t +10000 t= seconds H= meters Solve for t-9000 = -6t² + 3t +10000 9000+6t² -3t -10000=0 6t² -3t-1000=0 put it in a quadratic form ax² +bx+c=0 i.e. 6t²+( -3)t+(-1000)=0where a=6 b=-3 c

How would i calculate my grade

There are six weeks that we average to get our final grade but our final exam is 15% of the final grade so what would be the formula to use?-If the final exam is worth 15%, then the six weeks must be