Formulae Flashcards
1
Q
Angle bw Hr hand and Min Hand
A
(11/2) * M - 30H |
2
Q
sin2A
A
2*TanA/(1+Tan²A)
3
Q
cos2A
A
2cos²A - 1 and 1 - 2sin²A come from
(cos²A - sin²A)
4
Q
cos2A
A
2cos²A - 1 and 1 - 2sin²A come from
(cos²A - sin²A)
5
Q
cos2A (tan version)
A
1 - Tan²A / 1 + Tan²A
6
Q
sin3A
A
3sinA - 4sin³A
7
Q
cos3A
A
4cos³A - 3cosA
8
Q
tan3A
A
3tanA - tan³A / 1 - 3tan²A
9
Q
sin A/2
A
√[(1 - cos A) / 2]
10
Q
cos A/2
A
√[(1 + cos A) / 2]
11
Q
√ ( 1 + sin2A)
A
cosA + sinA
12
Q
[ (sin θ₁ + sin θ₂ + … + sin θₙ) /
(cos θ₁ + cos θ₂ + … + cos θₙ) ]
A
[ tan(θ₁ + θ₂ + … + θₙ) ] / n
13
Q
a sinθ + b cosθ = c
and a cosθ - b sinθ = ?
A
? = √ (a² + b² - c²)
