sin^3(x) = (sin(x))^3 = (1 - cos^2(x)) * sin(x)
cos^3(x) = (cos(x))^3 = (1 - sin^2(x)) * cos(x)
C = [ (1 - cos^2(x)) * sin(x) - (1 - sin^2(x)) * cos(x) ] / [ sin(x) + sin^2(x) * cos(x) ]
sin(x) = tan(x) / √(1 + tan^2(x))
cos(x) = 1 / √(1 + tan^2(x))
C = [ (1 - (1 / (1 + tan^2(x)))) * (tan(x) / √(1 + tan^2(x))) - (1 - tan^2(x) / (1 + tan^2(x))) * (1 / √(1 + tan^2(x))) ] / [ (tan(x) / √(1 + tan^2(x))) + (tan^2(x) / (1 + tan^2(x))) * (1 / √(1 + tan^2(x))) ]
C = [ (1 - 1 / (1 + 4)) * (2 / √(1 + 4)) - (1 - 4 / (1 + 4)) * (1 / √(1 + 4)) ] / [ (2 / √(1 + 4)) + (4 / (1 + 4)) * (1 / √(1 + 4)) ]
C = [ (1 - 1/5) * (2 / √5) - (1 - 4/5) * (1 / √5) ] / [ (2 / √5) + (4/5) * (1 / √5) ]
C = [ (4/5) * (2 / √5) - (1/5) * (1 / √5) ] / [ (2 / √5) + (4/5) * (1 / √5) ]
C = [ (8 / (5√5)) - (1 / (5√5)) ] / [ (2 / √5) + (4 / (5√5)) ]
C = [ (8 - 1) / (5√5) ] / [ (2 / √5) + (4 / (5√5)) ]
C = 7 / (5√5) / [ (2 / √5) + (4 / (5√5)) ]
C = 7 / (5√5) * [ (√5 / √5) / (2 / √5) + (4 / (5√5)) ]
C = 7 / (5√5) * [ (√5 / 2) + (4 / (5√5)) ]
C = 7 / (5√5) * [ (√5 / 2) + (4 / 5) ]
C = 7 / (5√5) * [ (√5 / 2) + (4 / 5) ]
C = (7√5 / (5√5)) * [ (√5 / 2) + (4 / 5) ]
C = (7 / 5) * [ (√5 / 2) + (4 / 5) ]
C = (7 / 5) * ( (√5 / 2) + (4 / 5) )
C = (7 / 5) * ( (√5 + 8) / 10 )
C = (7√5 + 56) / 50