1. Use a calculator (in radian mode) to find an approximate value of the expression correct to five decimal places, if it is defined. (If an answer is undefined, enter UNDEFINED.)

tan¹(26)

2. Use a calculator (in radian mode) to find an approximate value of the expression correct to five decimal places, if it is defined. (If an answer is undefined, enter UNDEFINED.)

cos¹(0.92761)

3. Find the exact value of each expression, if it is defined. (If an answer is undefined, enter UNDEFINED.) (a) tan¹(0)

(b) tan¹ (-3)

(c) tan¹ (-3/3)

4. Find the exact value of each expression, if it is defined. (If an answer is undefined, enter UNDEFINED.) (a) cos¹(1)

(b) cos¹ (1/2)

(c) cos¹ (-3/2)

5. Find the exact value of each expression, if it is defined. (If an answer is undefined, enter UNDEFINED.)

(a) sin¹(1)

(b) sin¹ (2/2)

(c) sin¹(3)

6. Find the exact value of each expression, if it is defined. (If an answer is undefined, enter UNDEFINED.)

(a) sin¹(1)

(b) sin¹ (3/2)

(c) sin¹(5)

7. Use a calculator (in radian mode) to find an approximate value of the expression correct to five decimal places, if it is defined. (If an answer is undefined, enter UNDEFINED.)

sin¹ (2/3)

8. Use a calculator (in radian mode) to find an approximate value of the expression correct to five decimal places, if it is defined. (If an answer is undefined, enter UNDEFINED.)

sin¹(-2/9)

9. Use a calculator (in radian mode) to find an approximate value of the expression correct to five decimal places, if it is defined. (If an answer is undefined, enter UNDEFINED.)

cos¹(2/9)

10. To define the inverse sine function, we restrict the domain of sine to the interval -------------- .On this interval the sine function is one-to-one, and its inverse function sin¹ is defined by sin¹(x) =ysin (-----------) =------------. For example, sin¹ (1/2) = --------- because sin(-------)=(----------).