1. Trigonometry Section 7.6 Apply inverse trigonometry functions

3. Inverse Trigonometric Functions
y = Tan-1 x is the inverse of y = Tan x
(Tan-1 x is an angle in the 1st or 4th quadrant)
y = Sin-1 x is the inverse of y = Sin x
(Sin-1 x is an angle in the 1st or 4th quadrant)
y = Cos-1 x is the inverse of y = Cos x
(Cos-1 x is an angle in the 1st or 2nd quadrant)
Sin-1 (.35)
Evaluate: Cos-1 (.5)

4. Evaluate without a calculator
Tan-1 (-1) Cos-1 (0)
Find cos(Tan-1 (2/3)) sec(Sin-1 (-.5))

5. assignment
Page 289 Problems 2,4,6,7,8,12,14,20