2026.01.12 - Trigonometric Functions

Angles with the same initial and terminal sides are .

• coterminal
• vertex
• radian
• the same

• radian
• degree
• angle

How many radians are there in one circle?

• One radian
• π radians
• 2π radians
• 4π radians

To convert degrees to radians, multiply degrees by .

• π/180
• 180/π
• π/360
• 360/π

Arc Length =

• radius × radian
• diameter × radian
• radius² × radian
• radius × degree

Area of Sector =

• ½ radius² × radian
• ½ diameter² × radian
• ½ radius × radian
• ½ radius² × degree

sinA

(a)  

cosA

(a)  

tanA

(a)  

Which statement is true?

• All points on the unit circle have y-value 1