Question

I need help in math can you please help me

Answer 1

We have the following:

`\begin{gathered} \sin \theta=-(8)/(17) \\ \theta=\sin ^(-1)(-(8)/(17)) \\ \theta=-28.07 \end{gathered}`

now, in Quadrant III (180° to 270°):

`\theta=180+28.07=208.7`

now, for cosine:

`\cos 2\theta=\cos (2\cdot208.7)=0.538=(539)/(1000)`

The answer is 539/1000