trig identities Flashcards
1
Q
sin^2θ + _____ = 1
A
cos^2θ
2
Q
tan^2θ +1 = _____
A
sec^2θ
3
Q
1 + _____ = csc^2θ
A
cot^2θ
4
Q
sin(-θ) = ____
A
– sinθ
5
Q
cos(–θ) = _____
A
cosθ
6
Q
tan(–θ) = ____
A
–tanθ
7
Q
sin(A+B) = _____
A
sinAcosB + cosAsinB
8
Q
sin(A–B) = ____
A
sinAcosB – cosAsinB
9
Q
cos(A+B) = ____
A
cosAcosB – sinAsinB
10
Q
cos(A–B) = ____
A
cosAcosB + sinAsinB
11
Q
tan(A+B) = ____
A
tanA+tanB/1–tanAtanB
12
Q
tan(A–B) = ____
A
tanA-tanB/1+tanAtanB
13
Q
sin(2θ) = _____
A
2sinθcosθ
14
Q
cos(2θ) #1 = ____
A
cos^2θ–sin^2θ
15
Q
cos(2θ) #2 = ____
A
1–2sin^2θ
16
Q
cos(2θ) #3 = ____
A
2cos^2θ–1
17
Q
sin
A
csc
18
Q
cos
A
sec
