Tyson13 Tyson13

01-03-2019
Mathematics

contestada

If cos x=8/17
and 270° < x < 360°
what is cos(2x)⁡?

Respuesta :

LammettHash LammettHash

07-03-2019

It follows immediately from the double angle identity:

[tex]\cos2x=2\cos^2x-1=-\dfrac{161}{289}[/tex]

Answer Link

Otras preguntas

How did hitler rise to power

A machine at a manufacturing plant can make 16 of Item A and 20 of Item B per hour. The machine runs 24 hours a day. Yesterday, it made 434 total items. Part A:

What is the mean of a binomial distribution with 20 trials and a probability of success for each trial of 30% ?

What kind of macromolecule is pictured below

6. Which of the following best replaces the question mark in the diagram above? Founding documents influenced colonial America American colonists participated i

Determine whether line c is a transversal of lines a and b. Explain your reasoning. I WILL AWARD DA BRILLIANT AWORD THINGY

SOMEONE PLEASE HELP ME !

你好，每个人都知道不同的语言，我是一个间谍，所以我知道 20 哈哈

Each student in a classroom has chosen either a green, red, or blue marble and written their initials on it. In addition, some of the marbles have the letter A

Read the text and question and choose the option with the correct answer. Felipe, ¿cuándo celebras el día del padre con tu familia en Europa? ¿Es en mayo o en j