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Day 2
- 4. Examples
1.
2.
3. Find the angle of smallest positive measure coterminal with:
a) 4000
b) 7100
- 6. Solution
P (x,y)
1
y
θ0 D (1,0)
O x
Therefore in a unit circle, given an angle of θ0, the coordinates of P are (cos θ, sin θ).
- 7. Find Tan θ
P (cosθ,sinθ)
650 D (1,0)
O
Note: When cos θ equals zero, which occurs
at any odd multiple of 900, then tanθ is UNDEFINED!