Use identities to find sin2θ and cos2θ, given cosθ= -12/15 and sinθ> 0 plz asap

see explanation

Step-by-step explanation:

using the trigonometric identities

• sin2x = 2sinxcosx

• cos2x = 2cos²x - 1

• sin²x + cos²x = 1

sinx = ±

       = ±

       = ±

       = ± = ±

since sinΘ > 0 then sinΘ = =

sin2Θ = 2 × × - = -

cos2Θ = 2 × (- )² - 1

           = 2 × - 1

           = - 1 = =

4

step-by-step explanation:

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.