The formula for sin 2θ is:
A
2 sin θ cos θ
B
sin²θ - cos²θ
C
1 - 2 sin²θ
D
2 cos²θ - 1
Analysis & Theory
sin 2θ = 2 sin θ cos θ is the double angle formula for sine.
The formula for cos 2θ in terms of sin θ is:
A
1 - 2 sin²θ
B
2 sin²θ - 1
C
2 sin θ cos θ
D
sin²θ - cos²θ
Analysis & Theory
cos 2θ = 1 - 2 sin²θ is a standard double angle formula.
The formula for cos 2θ in terms of cos θ is:
A
2 cos²θ - 1
B
1 - 2 cos²θ
C
2 sin θ cos θ
D
cos²θ - sin²θ
Analysis & Theory
cos 2θ = 2 cos²θ - 1 is the double angle formula expressed in terms of cos θ.
The formula for tan 2θ is:
A
2 tan θ / (1 - tan²θ)
B
tan²θ - 1 / 2 tan θ
C
2 sin θ cos θ
D
1 - 2 sin²θ
Analysis & Theory
tan 2θ = (2 tan θ) / (1 - tan²θ) is the double angle formula for tangent.
The formula for sin 3θ is:
A
3 sin θ - 4 sin³θ
B
4 sin³θ - 3 sin θ
C
3 cos θ - 4 cos³θ
D
3 tan θ - tan³θ
Analysis & Theory
sin 3θ = 3 sin θ - 4 sin³θ is the triple angle formula for sine.
The formula for cos 3θ is:
A
4 cos³θ - 3 cos θ
B
3 cos θ - 4 cos³θ
C
1 - 2 cos²θ
D
2 cos²θ - 1
Analysis & Theory
cos 3θ = 4 cos³θ - 3 cos θ is the triple angle formula for cosine.
The formula for tan 3θ is:
A
(3 tan θ - tan³θ) / (1 - 3 tan²θ)
B
(3 tan θ + tan³θ) / (1 + 3 tan²θ)
C
3 tan θ / (1 - tan²θ)
D
tan θ / 3
Analysis & Theory
tan 3θ = (3 tan θ - tan³θ) / (1 - 3 tan²θ) is the triple angle formula for tangent.
The formula for sin 4θ is:
A
8 sin θ cos³θ - 4 sin³θ cos θ
B
4 sin θ cos θ
C
3 sin θ - 4 sin³θ
D
sin²θ - cos²θ
Analysis & Theory
sin 4θ = 8 sin θ cos³θ - 4 sin³θ cos θ can be derived using multiple angle expansion.
The formula for cos 4θ is:
A
8 cos⁴θ - 8 cos²θ + 1
B
4 cos²θ - 3
C
2 cos²θ - 1
D
1 - 2 sin²θ
Analysis & Theory
cos 4θ = 8 cos⁴θ - 8 cos²θ + 1 is obtained using cos 2(2θ) formula.
The formula for tan 4θ is:
A
(4 tan θ - 4 tan³θ) / (1 - 6 tan²θ + tan⁴θ)
B
(4 tan θ + 4 tan³θ) / (1 + 6 tan²θ + tan⁴θ)
C
2 tan θ / (1 - tan²θ)
D
3 tan θ - tan³θ / (1 - 3 tan²θ)
Analysis & Theory
tan 4θ = (4 tan θ - 4 tan³θ) / (1 - 6 tan²θ + tan⁴θ) is the quadruple angle formula for tangent.