Question

I need help with my pre-calculus homework, please show me how to solve them step by step if possible. I need help with how to apply the problem on the calculator. The image of the problem is attached.Instructions: Make sure your calculator is in degree mode.

Answer 1

`\text{ }(9π)/(20)\text{ radians (option A)}`

Step-by-step explanation:

To convert 81 degrees to radian, we will apply the conversion:

1 π rad = 180°

let the 81° in rad = y

1 π rad = 180°

y = 81°

cross multiply:

1π rad (81) = 180 y

To get y, we divide both sides by 180:

`\begin{gathered} \text{y = }\frac{1\pi rad\text{ }*\text{ 81}}{180} \\ y\text{ = }\frac{81\text{ }\pi}{180}\text{ = }\frac{9*9\text{ }\pi}{9*0}\text{ } \\ 9\text{ is co}mmon\text{ to numerator and denominator. }It\text{ cancels out} \\ y\text{ = }(9\pi)/(20) \\ \\ 81\degree\text{ = }(9\pi)/(20)\text{ radians (option A)} \end{gathered}`