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

the length of a rectangular prism is 8height : 1surface area:250what is volume and width

If f(x) = x²-5x and g(x) = 2x-3, which expression represents the product of these two functions?1) x²-3x-32) 2x³-13x²+15x3) 9x²-15x4) 2x³-15x

What does "Cherry Picking" Mean?

the difference between memory and storage is that memory is ..................and storage is.............a)tempoary fermanentb)permanent tempoaryc)sloe fastd)al

For English, I am writing a diamante poem. My nouns are chocolate and lemon, and I've thought of the adjectives but I can't think of the verbs for chocolate. Ca

solve for g -a=gs g=

A can of drink is in the shape of a cylinder. The can has a radius of 4cm and a height of 15cm. Calculate the volume of the cylinder. You must include the corre

Circumference of a circle is 40 π cm. A quarter of the circle represents the developer layer genuine coupe. Calculate the surface compartment.

what is the answer to -xover7=1over26 what is x

Help with line equations?