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63 Days Remaining
43 weekdays left
Tuesday, April 13, 2004 ♥Amaths - Further Trigo
Monday, April 12, 2004 ♥Amaths - Simple Trigonometric
Additional Formulae
sin (A±B) = sinA cosB ± cosA sinB
cos (A±B) = cosA cosB -/+ sinA sinB
tan (A±B) = [tanA ± tanB ] / [1 -/+ tanA tanB]
R-formulae
a sinΦ ± b cosΦ = R sin(Φ±α)
a cosΦ ± b sinΦ = R cos(Φ -/+ α)
where R = √(a² + b²)
tan α = b/a
Double Angle Formulae
sin2A = 2 sinA cosA
Cos2A = [cos²A - sin²A] = [2 cos²A - 1] = [1 - 2sin²A]
tan2A = [2 tanA] / [1 - tan²A]
Factor Formulae
sinP + sinQ = 2.sin½(P+Q).cos½(P-Q)
sinP - sinQ = 2.cos½(P+Q).sin½(P-Q)
cosP + cosQ = 2.cos½(P+Q).sin½(P-Q)
cosP - cosQ = -2.sin½(P+Q).sin½(P-Q)
[Tuesday, April 13, 2004]
Loves 4E2 of 2OO8
Can Change The World
seC Φ = 1 / Cos Φ
conSec Φ = 1 / Sin Φ
tan Φ = sin Φ / cos Φ S/C ; Student/Council =)
coT Φ = 1 / Tan Φ = cos Φ / sin Φ
sin² Φ + cos² Φ = 1
1 + tan² Φ = sec² Φ
1 + cot² Φ = cosec² Φ
[Monday, April 12, 2004]
Loves 4E2 of 2OO8
Can Change The World
Please avoid using vulgarties =D thankew! C=
