natashanunez natashanunez

24-10-2017
Mathematics

contestada

If 3cot^2x - 5cotx = -2, then cotx = _____.
A. -2, -1/3
B. -1, -2/3
C. 1, 2/3
D. 2, 1/3

Respuesta :

24-10-2017

3cot²x - 5cotx = -2

Lets pretend cotx = t

3t² - 5t = -2
3t² - 5t + 2 = 0

factor polynomial
(3t-2)(t-1) = 0

3t-2 = 0
t-1 = 0

then "t" which is also cotx is equal to 1 or 2/3

Answer Link

Otras preguntas

Which one describes how much matter an object contains,using SI units?A.43kgB.65mC.38poundsD.89second

Who has pennfostsr answers?

Please help I don't know what to do for number 40

Please help I don't know what to do for number 40

Graph the linear equation solve for Y 3x+y=6

Janes quiz scores: 82 64 73 91 85 what is the mean ?

Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. Find all solutions whenever they exi

what is the factor of both x^2 - x - 6 and x^2 - 5x + 6 ? please explain .

Using Subjects and Predicates in a paragraph.Your best friend is on vacation, and you are pet-sitting. Write a paragraph about your experience taking care of yo

Please help I don't know what to do for number 40