Sine and Cosine with Radians

State a Pythagorean Identity

• a²+b²=c²

• sin²x+cos²x=1

• tan x=sin/cos

• sin x =1/cosx

Which function is the reciprocal of the sine?

• cosine

• secant

• cotangent

• cosecant

In which quadrants is the sine function positive?

• 1

• 1,2

• 2,3

• All

• -1 / 2
• √3 / 2
• -√3 / 2
• 1 / 2

• 
• 
• 
• 

Sine or Cosine?

• y=sinx

• y=cosx

• -1
• √2 / 2
• 1
• -√2 / 2

what is the amplitude of
y = 3sin (7x) -2

• 7

• -2

• 3

• 6

What is a radian?

• a central angle created when the radius equals the arc length

• a central angle created when the radius is twice as big as the arc length

• a central angle created when the radius is half as big as the arc length

• A central angle created when one radius equals the other radius