Answer:

Step-by-step explanation:
Given


Required
The product
The product is:
'
Cancel out the negative signs

Simplify fractions



(3t² +t -12t - 4)(t+2)=0
(3t³ - 5t² -26t -8) =0
t = -2
Yes there will be more than one
The number that expresses 6.72 as a fraction is simplest form is...
6.72= 168/25
First you must know that for remarkable angles: cos (0) = 1, cos (π) = - 1, cos (π / 2) = 0, cos (3π / 2) = 0, cos (2π) = 1. Then, by simple substitution in the given formula, you can find the solutions of x. Which for the interval [0, 2π) are: x = π, x = pi divided by two and x = three pi divided by two.Attached solution.