If cosθ=3/5 and θ is in quadrant iv, sin2θ=?

-

Step-by-step explanation:

Using the double angle identity

sin2x = 2sinxcosx and

sin²x + cos²x = 1 ⇒ sinx = ±

Since Θ is in fourth quadrant then sinΘ < 0

sinΘ =-  

       = -

      = -

     = - = -

Hence

sin2Θ = 2 × - × = -

let y equal to

the total fare and x is the mile of taxi ride. so the equation is

y = 0.55x + 1.75

since susie has

$10 to spend for a taxi cab, so he can have

10 = 0.55x +

1.75

x = 15 miles of

taxi ride

so the system of

inequality is

10 < 0.55x +

1.75

x > 2

x=0

step-by-step explanation: