4.7 sin(arccos) lesson

The range of arctan(x) is

• (-90,90)

• (-1,1)

• [-1,1]

• (-∞,∞)

Answer explanation

(-π/2,π/2) is the range for inverse tan

What's the angle that answer the question?

• -45

• 315

• 405

• -90

• 0

What is the range of arccos(x)?

• [0,π]

• [-π/2,π/2]

• (-π/2,π/2)

• (-∞,∞)

cos(π) =

• -1

• 0

• 1

• π/2

cos(π/4) =

• 1

• 0

What is cos(x)?