princess46764 princess46764

15-06-2017
Mathematics

contestada

cos 2x cos x − sin 2x sin x = radical 3 /2

Respuesta :

mreijepatmat mreijepatmat

15-06-2017

cos2x.cosx - sin2x.sinx = cos(2x+x)

cos(2x+x) = cos(3x) = (√3)/2

cos⁻¹ (√3/2) = 30°, so x =30/3 = 10°

Answer Link

Otras preguntas

the radius of a softball is almost 2 inches. The radius of a basketball is almost 5 inches How would the surface area of a basketball compare to the surface are

Identify the subordinate clause and tell if it is used as a noun, adjective, or adverb. Click on the blue box until the correct answer appears. The 4-H Club is

Describe and account for the changes in the American presidency between 1960 and 1975, as symbolized by Kennedy’s “Camelot”, Johnson’s Great Society, and Nixon’

How do you use area on funny looking shape

In recent years, people have been motivated to move from rural areas to urban areas for __________.

8. Which statement best describes the Richter scale? A. It's named after a scientist who studied tornadoes. B. It's a numerical rating system that measures

who was responsible for the holocaust

In recent years, people have been motivated to move from rural areas to urban areas for __________.

K, m,n each stand for a whole number. They add together to make 1500 K+m+n=1500 M is 3 times as big as n. K is twice as big a n. Calculate the numbers k, m, n

Which words in the sentence make up the adverb phrase? Todd built an impressive model bridge with glue and craft sticks. A. with glue and craft sticks B. Todd b