Trigonometry Flashcards
1
Q
What is the basic squared trig identity?
A
Sin^2x+Cos^2x = 1
2
Q
What are the two further squared trig identities?
A
Tan^2x + 1 = sec^2x
Cot^2x + 1 = Cosec^2x COT AND COSEC.
3
Q
What is the double angle formula for sin2A?
A
2SinAcosA
4
Q
What are the three double angle formulas for Cos2A?
A
Cos^2A - Sin^2A (COS ALWAYS COMES FIRST)
2Cos^A-1
1-2Sin^A
5
Q
What is the double angle formula for Tan2A
A
2tanA/1-tan^2A
6
Q
What is Sin(90-x)
A
Cos(x)
7
Q
What is Cos(90-x)
A
Sin(x)
8
Q
What is tan equaled to?
A
sin/cos
9
Q
what is cot equaled to?
A
cos/sin
