Trigometric Function Rules Flashcards
1
Q
Recall the three identifies that involve cos 2ß
A
- Cos2ß= cos^2ß - sin^2ß
- Cos2ß= 2cos^2ß - 1
- Cos2ß= 1- 2sin^2ß
2
Q
Half angle identify of cos
A
Cos2/A= +/-((1+cosA)/2)^.5
3
Q
Half angle identify of tan
A
Tan(ß/2)= +-((1-cosß)/(1+cosß))^.5
4
Q
Sin is ___ in the first quadrant
A
Positive
5
Q
Cos is ___ in the first quadrant
A
Positive
6
Q
Who’s a cutie??
A
YOU ARE. YOU CAN DO THISSSS :)
7
Q
Cos is __ in the 2nd quadrant
A
Negative
8
Q
Sin is ____ in the 2nd quadrant
A
Positive
9
Q
Cos is ___ in the 3rd quadrant
A
Negative
10
Q
Sin is __ in the 3rd quadrant
A
Negative
11
Q
Cos is ___ in the 4th quadrant
A
Positive
12
Q
Sin is ___ in the 4th quadrant
A
Negative
13
Q
Cos of 0 degrees
A
1
14
Q
Sin of 0 degrees
A
0
15
Q
Cos of 30 degrees
A
((3)^.5)/2
16
Q
Sin of 30 degrees
A
1/2
17
Q
Cos of 45 degrees
A
((2)^.5)/2
