Trigonometric Multiple Angles~ Multiple choice

Given are some identities of trigonometric multiple Angles. Guess its formula
Quiz by SWATkun
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Last updated: November 27, 2019
First submittedNovember 27, 2019
Times taken12
Average score33.3%
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1. Sin(2θ)
2 Sin θ Cos θ
2 Sin θ 2 Cos θ
Sin θ 2 Cos θ
Sin 2 θ Cos 2 θ
2. Cos(2θ)
Sin2 θ - Cos2 θ
Cos2 θ - Sin2 θ
Sin 2 θ - Cos 2 θ
Cos 2 θ - Sin 2 θ
3. Tan2 θ
(1 + Cos )/(1 - Cos )
(Cos2 θ + 1)/(Cos2 θ - 1)
(1 - Cos )/(1 + Cos)
(Cos2 θ - 1)/(Cos2 θ + 1)
4. Sin(3θ)
4 Sinθ - 3 Sin 3θ
3 Sin3θ - 4 Sinθ
3 Sinθ - 4 Sin4θ
3 Sinθ - 4 Sin3θ
5. Cos(3θ)
4 Cos3θ - 3 Cosθ
3 Cos4θ - 4 Cosθ
4 Cos4θ - 3 Cosθ
3 Cos3θ - 4 Cosθ
6. Tan(3θ)
(2 tanθ - tan3θ)/(1 - 2 tan3θ)
(3 tanθ - tan3θ)/(3 - 1 tan2θ)
(3 tanθ - tan3θ)/(1 - 3 tan2θ)
(3 tanθ - tan2θ)/(1 - 3 tan3θ)
7. 2Cos2θ
1 + Cos(2θ)
Cos(2θ) - 1
Cos(2θ) + 1
1 - Cos(2θ)
8. 2Sin2θ
Cos(2θ) + 1
1 - Cos(2θ)
1 + Cos(2θ)
Cos(2θ) - 1
9. Tan(2θ)
2 tanθ/(2 - tan2θ)
(2 - tan2θ)/2 tanθ
2 tanθ/(1 - tan2θ)
2 tanθ/(1 + tan2θ)
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