Questions with answers on how to find exact values of trigonometric functions. You might need the table of values of the trigonometric functions for special angles.

In all questions below, you are required to find exact values, if possible, of given trigonometric functions.

**Question 1:**

sin ( -π / 4)

**Question 2:**

tan ( - 3 π / 4)

**Question 3:**

sec ( 5 π / 3)

**Question 4:**

cot ( - 5 π / 3)

**Question 5:**

cos ( 25 π / 3)

**Question 6:**

csc ( 15 π / 6)

**Question 7:**

sin( 17 π / 4 )

**Question 8:**

sec ( π / 2 )

**Question 9:**

tan ( 5 π / 6)

**Question 10:**

csc ( 15 π / 2)

**Answers to Above Questions:**

Note: sqrt means square root.

question 1: - sqrt ( 2 ) / 2

question 2: 1

question 3: 2

question 4: sqrt( 3 ) / 3

question 5: 1 / 2

question 6: 1

question 7: sqrt( 2 ) / 2

question 8: undefined

question 9: - sqrt( 3 ) / 3

question 10: -1

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