. Expanding yields
![\bf cos[4x]\iff cos[2(2x)]\implies 2cos^2[2x]-1\iff 2[cos(2x)]^2-1 \\\\\\ 2[\ 2cos^2(x)-1\ ]^2-1\impliedby \textit{now, expanding the binomial} \\\\\\ 2[\ 2^2cos^4(x)-4cos^2(x)+1^2\ ]-1 \\\\\\ 2[\ 4cos^4(x)-4cos^2(x)+1\ ]-1 \\\\\\\ [\ 8cos^4(x)-8cos^2(x)+2\ ]-1 \\\\\\ 8cos^4(x)-8cos^2(x)+2-1\implies 8cos^4(x)-8cos^2(x)+1](/tpl/images/0306/9541/846f4.png)
Pre-calculus !
rewrite cos4x in terms of cosx
!...
Answers: 1
Another question on Mathematics
Mathematics, 21.06.2019 14:40
Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .
Answers: 2
Mathematics, 21.06.2019 16:30
Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)
Answers: 2
Mathematics, 21.06.2019 21:00
The paint recipe also calls for 1/4 cup of food coloring. tyler says mrs.mcglashan will also need 6 cups of food coloring. do u agree or disagree? explain.
Answers: 2
Mathematics, 21.06.2019 22:00
Benjamin is making bow ties. how many 1/2yards lomg bow ties can he make if he has 18 feet of fabric?
Answers: 2
You know the right answer?
Questions
Physics, 16.12.2019 16:31
Mathematics, 16.12.2019 16:31
Mathematics, 16.12.2019 16:31
Mathematics, 16.12.2019 16:31
Social Studies, 16.12.2019 16:31
Mathematics, 16.12.2019 16:31
Computers and Technology, 16.12.2019 16:31
Mathematics, 16.12.2019 16:31
Mathematics, 16.12.2019 16:31
Mathematics, 16.12.2019 16:31
Biology, 16.12.2019 16:31
Advanced Placement (AP), 16.12.2019 16:31
