Evaluate Sine Cosine Tangent Unit Circle

Unlike right triangle trigonometry, sine and cosine may be negative. Thinking about how sine, cosine, and tangent relate to (x,y) coordinate pairs on the unit circle, find the quadrants where: sine is positive: ​ (a)   ​& (b)   sine is negative: ​ ​ (c)   &​ (d)  

• I

• II

• III

• IV

Unlike right triangle trigonometry, sine and cosine may be negative. Thinking about how sine, cosine, and tangent relate to (x,y) coordinate pairs on the unit circle, find the quadrants where: tangent is positive: ​ (a)   ​& (b)   tangent is negative: ​ ​ (c)   &​ (d)   ​

• I

• III

• II

• IV

Unlike right triangle trigonometry, sine and cosine may be negative. Thinking about how sine, cosine, and tangent relate to (x,y) coordinate pairs on the unit circle, find the quadrants where: cosine is positive: ​ (a)   ​& (b)   cosine is negative: ​ ​ (c)   &​ (d)  

• I

• IV

• II

• III

What is the order of the coordinate pairs for the points on the Unit Circle?

Mathematical Equivalence

ON

Mathematical Equivalence

ON

tan 7π/4

• -1

• 1

• √2/2

• undefined

sin 60° = ​ ​ (a)   / ​ ​ (b)  

​ ​ ​

• 2

• 1