lesleal31 lesleal31

04-05-2017
Mathematics

contestada

Rewrite cos2 67.5° – sin2 67.5° using a double-angle identity.
cos 135°

sin 135°

cos 33.75°

sin 33.75°

Respuesta :

zebsi0n zebsi0n

04-05-2017

The Double Angle identity for cos is as follows:
[tex]cos(2a)=cos^2(a)-sin^2(a)[/tex]
Because this is the same form as the equation you asked for, just double 67.5 to get cos(135).

Answer Link

Otras preguntas

Which side does these following words go ? : orange, dragon, engine,digit ?

The rise of agriculture and permanent settlements was a worldwide phenomenon during the Neolithic era. True False

What evidence suggests that the Tainos were not annihilated and to some extent still exist today?

The term that best describes factory work during the 1800s is

"A sweater that costs $20 was marked up by 60%. what was the markup and what is now the selling price?" for the markup I got 12 and for the selling price I got

___________ focus on how people use messages to influence each other in various contexts and cultures, using a variety of media. A. Public speakers B. Radio pe

Solve. x – 6 = –14 a. –20 b. 20 c. 8 d. –8

What is a motif? a. a repeated element b. something that is used to stand for something else c. the main idea d. a message or main idea

What did this invention do to the price of cotton production

One of the following is correctly termed a substance, and the others are mixtures. The substance is A. fruit punch. B. amber gemstones. C. clam chowder. D. copp