# Math - PreCalc (12th Grade)

posted by .

Which rectangular equation corresponds to these parametric equations?
x = 0.2sec t and y = -0.25tan t

A) 25x^2 − 16y^2 = 1
B) 25x^2 + 16y^2 = 1
C) x^2 − 16y^2 = 25
D) 25y^2 − 16x^2 = 1
E) 4x^2 − 16x^2 = 1

• Math - PreCalc (12th Grade) -

since sec^2 = 1+tan^2,

(x/.2)^2 = (y/-.25)^2 + 1
25x^2 - 16y^2 = 1

Looks like A to me

## Respond to this Question

 First Name School Subject Your Answer

## Similar Questions

1. ### Algebra I

16y^{2}-40y+? I really need to figure out what the question mark is, but I am so confused. You are probably studying completing the square. Study the result of something like (5x-6)^2 the result is 25x^2 - 60x + 36 notice if you take
2. ### Math

9x^2+16y^2-18x+64y-71=0 find the coordinates of the center, the foci, and the vertices of this ellipse. 9x^2+16y^2-18x+64y-71=0 9x^2-18x+16y^2+64y=71 9(x^2-2x)+16(y^2+4y)=71 9(x^2-2x+1)+16(y^2+4y+4)=71
3. ### math help urgent

what di di do wrong in this??? the question is: x-8y=18 -16x+16y=-8 i did : first multiplied the first equation with 2 then 2x-16y=36 -16+16y=-8 ----------- -14x=28 x=28/-14 x=-2 now x-8y=18 (-2)-8y=18 -8y=18+2 -8y=20 y=20/-8 y= 2.5
4. ### Math I really need help!

Multiply and simplify by factoring. Assumem that all expressions under radicals represent nonnegative numbers. ∛(y^13) ∛(16y^14) ∛y^13 x 16y^14 ∛16y^27 Am I even close here?
5. ### Algebra.

Help? -Solve Polynomial Equations By factoring. 1. x^6-25x^4=0 2. y^3-3y^2=16y-48 3. x^3+2x^2-9x-18=0 4. x^3+x^2-4x-4=0 5. x^3-7x^2=-5x-30 6. a^4+2a^3+a^2=0 7. 3n^4-4n^2=-1 8. 8x^5+10x^4=4x^3+5x^2 9. 2n^4-9n^2+4=0 10. 8y^4 / y^2 -
6. ### Algebra.

Help? -Solve Polynomial Equations By factoring. 1. x^6-25x^4=0 2. y^3-3y^2=16y-48 3. x^3+2x^2-9x-18=0 4. x^3+x^2-4x-4=0 5. x^3-7x^2=-5x-30 6. a^4+2a^3+a^2=0 7. 3n^4-4n^2=-1 8. 8x^5+10x^4=4x^3+5x^2 9. 2n^4-9n^2+4=0 10. 8y^4 - 4y^2 =0
7. ### Calc

Which rectangular equation corresponds to this set of parametric equations?
8. ### Math, Calc

Which rectangular equation corresponds to this set of parametric equations?
9. ### Math - PreCalc (12th Grade)

If Sn = 1 + 6 + 11 + 16 + 21 + 26...... where an = (5n − 4), what would be the mathematical expression represented by Sk + ak + 1?
10. ### maths

find the encentricity,the foci and vertex and the equation of directrix and asymptote to the equation give the ellipse below 25x^2+4y^2-50x-16y-59=0

More Similar Questions