Trigonometric Functions

What is the missing number?
Sin(45) = Cos(   )

• 45

• 95

• 145

• 195

What is the missing number?
Sin(70) = Cos (   )

• 20

• 25

• 30

• 35

What is the missing number?
Sin(   ) = Cos(60)

• 20

• 25

• 30

• 35

sin 20⁰ = ?

• cos 70⁰

• sin 70⁰

• cos 20⁰

• tan 20⁰

If sin x = cos y, what must be true about x and y?

• x + y = 90⁰

• x = y 

• x = 2y

• x + y = 180⁰

If sin x = cos x, what is the value of x?

• 45⁰

• 90⁰

• 30⁰

• 60⁰

If cos α = sin β, what must be true about α and β?

• α and β are complementary angles

• α and β are congruent angles

• α and β are right angles

• α and β are supplementary angles

What is the missing number?
Sin(   ) = Cos(40)

• 30

• 40

• 50

• 60

A tourist views a deer from a height of 45 feet.  The horizontal distance between the tourist and the deer is 130 feet.  At what angle (x) should the tourist hold his camera to photograph the deer? Round your answer to the nearest degree.  

• 19 degrees

• 45 degrees

• 71 degrees

• 138 degrees 

What is the value of y?

• 3√2

• 4√3

• 6

• 1