Question

Please help greatly appreciated image attached (using e or in is not allowed)

Answer 1

Step 1

Given;

Step 2

If you plot the point P in the xy-plane, you see it lies in Quadrant II. Draw the segment from the origin O to P and find its length:

`\begin{gathered} r=√((-5)^2+(7)^2) \\ r=√(74) \end{gathered}`
`cos\theta=(x)/(r)=(-5)/(√(74))`
`\begin{gathered} The\text{ exact value of cos}\theta=(-5)/(√(74))*(√(74))/(√(74))=(-5√(74))/(74) \\ Numerical\text{ value to 2 decimal places=-0.58} \end{gathered}`

Answer;