bsrcakes2 bsrcakes2
  • 25-05-2022
  • Mathematics
contestada

Find sin 2x if cos x=-2/3 and x is in quadrant 2

Respuesta :

Аноним Аноним
  • 25-05-2022

Answer:

-4√5/9.

Step-by-step explanation:

if cos x = -2/3 then sin x = √(1 - (-2/3)^2)

= √(5/9)

= √5/3.

(As x is in quadrant 2 sin x is positive).

So:

sin2x = 2 sin x cos x

         = 2 * √5/3 * -2/3

          =  -4/3 * √5/3

          =  -4√5/9.

Answer Link

Otras preguntas

Which statement best supports relocating those with mental illness to specialized hospitals from jails? Individuals with mental illness are treated better in j
what are the uses of a refrigerator?explain with examples.?​
Select the correct answer. A new building in the shape of a square pyramid is to be constructed. The slant height will be five times the side length of the base
Need help please someone answer quick
I have a question, I'm not speaker English and well I am here a a song called: Josh A - Heartbreaks And well, the singer, when he says ''couldn't'', did I hear
Verbs in the progressive form usually end with the letters
7. Find the equation of the line passing through the points P(-2,7) Q(2,-3)
If a car travels 300 kilometers in 3 hours, its average speed is 100 km/hr. true or false
If 2y=x³ + 2x², find dy/dx when x=2.
how do u multiply 1x100000000000000000000000000000??