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trigonometry

trigonometry

Last update 

Important trigonometry formulas (+ Arc formulas )

Items (52)

  • Cos2x

    1-sin^2x

  • Sin2x

    2sinxcosx

  • SinxCosx

    1/2 (Sin2x)

  • tg^2(x/2)

    (1-cosx)/(1+cosx)

  • Sin^2(x)

    1/1+cot^2x

  • Cos^2(x)

    1/1+tg^2(x)

  • Sin3x

    3sinx-4sin^3 (x)

  • Cos3x

    4cos^3 (x)-3cosx

  • sin^2x-cos^2x

    sin^4x-cos^4x

  • sin(x)+sin(y)

    2 Sin (x+y) * Cos (x-y)

  • sin(x)-sin(y)

    2 Sin (x-y) * Cos (x+y)

  • cos (x)+cos (y)

    2 cos (x+y) * cos (x-y)

  • cos (x)-cos (y)

    - 2 Sin (x+y) * Sin (x-y)

  • Sin (x+-y)

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

  • Cos (x+-y)

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

  • tg (x+-y)

    tg (x) +- tg (y) / 1-+ tg (x) tg (y)

  • 2 Sin (x)Cos (y)

    Sin (x+y) + Sin (x-y)

  • 2 Cos(x) Cos(y)

    Cos (x+y) + Cos (x-y)

  • 2 Sin (x) Sin (y)

    Cos (x-y)-Cos (x+y)

  • tg (2x)

    2 tg (x) / 1-tg^2 (x)

  • (Sinx +- Cosx) ^2

    1 +- Sin(2x)

  • tg (45 +- x)

    1 +- tg (x) / 1 -+ tg (x)

  • Sin^2 (x) + Cos^2 (x)

    1

  • Sin^4 (x) + Cos^4 (x)

    1 - 1/2 (Sin (2x))

  • Sin^6 (x) + Cos^6 (x)

    1 - 3/4 (Sin (2x))

  • Sin (3x)

    4 sin (x) sin (60-x) sin (60+x)

  • Cos (3x)

    4 cos (x) cos (60-x) cos (60+x)

  • tg (x) + cot (x)

    2 / Sin (2x)

  • cot (x) - tg (x)

    2 cot (2x)

  • tg (x) - cot (x)

    -2 cot (2x)

  • Sin (x+y) Sin (x-y)

    sin^2 (x) - sin^2 (y)

  • cos (x+y) cos (x-y)

    cos^2 (x) - sin ^2 (y)

  • Sin (ArcCos(x))

    sqrt (1 - x^2)

  • Cos (ArcSin (x))

    sqrt (1 - x^2)

  • tg (ArcSin (x))

    x / sqrt (1 - x^2)

  • tg (ArcCos (x))

    sqrt (1 - x^2) / x

  • Sin (ArcSin (x))

    x

  • Cos (ArsCos (x))

    x

  • ArcCos (x) + ArcSin(x)

    90

  • Sin (ArcTg (x))

    x / sqrt ( 1 + x^2 )

  • Cos (ArcTg (x))

    1 / sqrt ( 1 + x^2 )

  • Cos (ArcCot (x))

    x / sqrt (1 + x^2)

  • tg (x) + tg (1/x) ; x>0 , x <0

    90 , -90

  • cot (x) + cot (1/x) ; x>0 , x <0

    90 , 270

  • Cos(2x)

    2cos^2 (x) - 1

  • Cos(2x )

    cos^2(x)-sin^2(x)

  • Sin (2x)

    2tg(x) / 1 + tg^2(x)

  • Cos (2x)

    1 - tg^2(x) / 1 + tg^2(x)

  • Sin ^ 2 (x)

    tg^2(x) / 1+tg^2(x)

  • tg (x) + tg (1/x) ; x>0 , x <0

    90 , -90

  • cot (x) + cot (1/x) ; x>0 , x <0

    90 , 270

  • Cos ^ 2 (x)

    cot^2(x) / 1+cot^2(x)