Trig Flashcards
1
Q
Sin =
A
O/H
2
Q
Cos =
A
A/H
3
Q
Tan =
A
O/A
4
Q
Hypotenuse can never be _____. Why?
A
Negative
Can’t divide by a negative
5
Q
Describe the cast diagram
A
6
Q
Describe the cast diagram
A
7
Q
What are reductions
A
We can write a trig ratio of a non-acute angle in terms of a ratio of an acute angle. Reduction formulae is a method whereby we can take an angle in any quadrant and reduce it to an angle in the first quadrant, this is because all trigonometric ratios are positive in the first quadrant.
8
Q
Describe the CAST diagram, including reductions and revolutions
A
9
Q
Sin and cos are _____.
A
Complementary. Meaning when they add to 90 theyre =
10
Q
Sin(90-θ)=?
A
+cos θ
11
Q
Cos(90-θ)=?
A
+sin θ
12
Q
sin(90+ θ)=?
A
+cos θ
13
Q
Cos(90+ θ)=?
A
-sin θ
14
Q
Sin(270-θ)=?
A
+Cos θ
15
Q
Cos(270-θ)=?
A
-sin θ
20
Q
Special triangles?
A
