trigonometry Flashcards
1
Q
To find all Cos angles
A
+/- θ + 2kπ
2
Q
To find all Tan angles
A
θ + kπ
3
Q
To find all Sin angles
A
θ + 2kπ or π - θ + 2kπ
4
Q
2sinθ =
A
= 1 + 3cosθ
5
Q
cos2θ =
A
= cos↑2(θ) - sin↑2(θ)
= 2cos↑2(θ) - 1
= 1 - 2sin↑2(θ)
6
Q
sin2θ =
A
2sinθcosθ
7
Q
1 + tan↑2(θ) =
A
sec↑2(θ)
8
Q
1 + cot↑2(θ) =
A
cosec↑2(θ)
