Seudónimo Seudónimo
  • 21-09-2021
  • Mathematics
contestada

Which expression is equivalent to cos 150°?
three choices are:
A. cos 30°
B. cos 330°
C. cos (-30°)
D. cos (-210°)​

Respuesta :

Аноним Аноним
  • 21-09-2021

We know

[tex]\boxed{\sf cos(180-\Theta)=-cos\Theta}[/tex]

Now

[tex]\\ \sf{:}\!\!\implies cos150[/tex]

[tex]\\ \sf{:}\!\!\implies cos(180-30)[/tex]

[tex]\\ \sf{:}\!\!\implies -cos30[/tex]

or

[tex]\\ \sf{:}\!\!\implies cos(-30°)[/tex]

Option C

Answer Link

Otras preguntas

Pls help and no links
9. The specified dictionary definition of a word is its A. usage. B. etymology C. connotation. D. denotation.
Please help ASAP!!!!!!
Line RS bisects segment PQ at R. If RQ = x + 9 and RP = 2x, find PQ.
Which of the following is an example of a connection between the hydrosphere and the lithosphere? A.waves eroding rocks on the beach B.water evaporating to for
How is every one to day? fr ee points ... here!
Please help!!!! I have no clue how to do this
Which political system has no central government? a.capitalism b.communism c.socialism d.mixed market
Bacterial growth can be minimized by properly controlling Food, Air, Time, Mold Food, Texture, Oxygen, Moisture Time, Temperature, Oxygen, Moisture Aroma, Time,
what is burglary is limited to breaking into a building or structure and doesn't involve the use of force or threat of force, robbery does.