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Trignometry Formula

Kanchan

07/07/2017 0 0

Sum/difference identities:

sin (x + y) = sin(x) cos(y) + cos(x)

sin(y),

cos(x + y) = cos(x) cos(y) - sin(x)

sin(y),

sin(x - y) = sin(x) cos(y) - cos(x) sin

(y),

cos(x - y) = cos(x) cos(y) + sin(x)

sin(y),

Double angle identities:

sin(2x) = 2 sin(x) cos(x),

cos(2x) = cos2(x) - sin2(x),

cos(2x) = 2 cos2(x) - 1,

cos(2x) = 1 - 2 sin2(x),

tan(2x) = [2 tan(x)]/[1-tan2(x)],

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