### Home > CCA2 > Chapter 12 > Lesson 12.1.3 > Problem 12-53

12-53.

For each of the following problems, find all of the solutions without using a calculator. Use a graph or unit circle to support your answers. Then predict the solution that your calculator will give and use your calculator to check your prediction.

Subtract 2 from both sides and divide by

to solve for . On a unit circle, find the two different times

. To give all of the solutions, remember that every time you go around the circle, that value occurs again. Since there are radians in a circle, add to each solution.

Use the same method as part (a).

tan

Use the same method as part (a). How is the tangent function different from the sine function?

cos ^{2}Remember to check your answers with your calculator!