emiliefowkes emiliefowkes

26-05-2020
Mathematics

contestada

If im given cos81 = 0.1564, how do i evaluate other cosines without a calculator? Like cos99 and cos279 for example.

Respuesta :

ronhagrid310 ronhagrid310

26-05-2020

Answer:

As property of trigonometry:

cos x = - cos(180 - x)

=> cos 99 = - cos(180 - 99) = - cos 81 = - 0.1564

cos x = cos(360 - x)

=> cos 279 = cos(360 - 279) = cos 81 = 0.1564

Hope this helps!

:)

Answer Link

Otras preguntas

Please help with a biology question!!! Thanks!!

Which helps James Russell Lowell to create a close bond between the reader and the speaker in "Life"? A. his use of the second-person point of view B. hi

According to the kinetic molecular theory, which statement describes the particles of an ideal gas? -1)The motion of the gas particles is orderly and circular.

Jorge has $300 for work he performed. he expects to spend the money in the next few weeks to buy a new bike. which type of account will be best for jorge?

During the late 19th century, some United States newspapers printed exaggerated accounts of Spanish cruelty in Cuba. These reports helped to bring about the Spa

what is the square root of 5

What are the four psychological factors that affect how well a person adheres to an exercise program and which one is considered the most important?

RANGKAIAN RLC SERI PADA TEGANGAN BOLAK BALIK 220V R=80 OHM XL= 90 OHM XC = 30 OHM MAKA TEGANGAN PADDA INDUKTOR ADALAH???

what is a krabby patty?

The measure used to account for biological effect upon tissue is the