### Home > CCA2 > Chapter 12 > Lesson 12.1.3 > Problem 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 you |

sin Subtract 2 from both sides and divide by

to solve for sin . sin

^{1}/_{2}On a unit circle, find the two different times sin

^{1}/_{2}. To give all of the solutions, remember that every time you go around the circle, that value occurs again. Since there areradians in a circle, add to each solution.

cos 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!