calebmarkgreenberg calebmarkgreenberg

03-05-2020
Mathematics

contestada

Solve for 0-360 degrees.

2cos^2x + cosx = 0

Respuesta :

TREKKER TREKKER

03-05-2020

Answer:

60, 90, 270, 300 degrees

Step-by-step explanation:

a = cos(x)

2(a^2) + a = 0

a(2a + 1) = 0

a = 0 OR 1/2

so...

cos(x) = 0 OR cos(x) = 1/2

x = 90 or 270 OR x = 60 or 300

Answer Link

Otras preguntas

What is another word for cytosol

Two atomic bombs were dropped on this nation, thus ending World War II. China Germany Soviet Union Japan

A MAN walked for 1/3 hour and then got an automobile ride for 1/2 hour. what part of time consumed he ride on automobile ???? (a) 1/3 (b) 3/5 (c) 5/6

Money is useful to people because it is __________.Select one of the options below as your answer: a. a medium of exchange b. prestigious c. nice to look at

Explain why the conversion ratios used between the SI and imperial systems are not nice, round numbers like those used to convert within either system.

Which would a historian use most often to research people or events from the past? a. old books and papers b. old buildings and ruins c. old tools and pottery

C6H12O6 is a type of protein carbohydrate amino acid polymer

What is the value of the expression |x| + |y + z| when x = –6, y = –3, and z = –5?

A solution that contains equal numbers of hydrogen and hydroxyl ions would be called acidic basic alkaline neutral

help please asap!!!!!!!!!!!!!!!!!!!