Inverse Trig Functions on the Unit Circle

cos^-1(0) = 

• ½π
• π
• 1
• none of these

cos^-1(√3/2) = 

• π/3
• 2π/3
• π/6
• 5π/6

arcsin(-1/2)

• π/3

• π/6

• 5π/6

• -π/6

arcsin(0)

• 0
• 1
• 1/2
• 3/2

sin^-1(1) =

• π/4

• π/2

• π

• 0

cos^-1(√2/2) =

• π/2

• π/3

• π/4

• π/6

What range of angles can you get from inverse cosine?

• 0 to π
• 0 to 2π
• -π/2 to π/2
• π/2 to 3 π/2

What range of angles can you get from inverse sine?

• 0 to π
• 0 to 2π
• -π/2 to π/2
• π/2 to 3 π/2

arctan[tan(-2π/3)]

• -π/3
• π/3
• -2π/3
• 2π/3

arccos[cos(-5π/3)]

• -π/3
• π/3
• -5π/3
• 5π/3