unit circle

• name the following parts:

  A) terminal side

  B) initial side

  C) vertex

  D) arrowhead

  
• reference angle of 60degree is - 60 degree
• reference angle of 80degree is - 80degree
• reference angle of 225degree is - 45degree
• reference angle of 300degree is - 60degree
• reference angle or - acute angle
• radian degree is - naay pi
• converting degree to radian measure - pi/180degree
• converting measure to degree - 180degree/pi
• coterminal angles -  adding or subtracting 360° or 2π to each angle
• central angle - a line is attached to the central or origin (vertex)
• unit circle - a circle with a radius of 1
• What happens when the angle, θ, is 0°?

  cos 0° = 1, sin 0° = 0 and tan 0° = 0
• cosine is the - x coordinates
• sine is the y coordinates
• cosine is 3 2 1 in order
• sine is 1 2 3 in order
• formula for Tangent is - sin/cos
• Fill the following

  A) √3/2

  B) √2/2

  C) 1/2

  D) 1/2

  E) √2/2

  F) √3/2

  
• fill

  A) √2/2

  B) 1/2

  
• solve for sine 30degree - 1/2

  
• find the value of cos330degree - √3/2

  
• a point on the circumference of the unit circle has coordinates (√3/2 , 1/2). What angle does this represent?

  30degree