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A.7: Trigonometría — Identidades simples

  • Page ID
    119358
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    • Periodicidad

      \ begin {alinear*}\ sin (\ theta+2\ pi) &=\ sin (\ theta) &\ cos (\ theta+2\ pi) &=\ cos (\ theta)\ end {align*}

    • Reflexión

      \ begin {align*}\ sin (-\ theta) &=-\ sin (\ theta) &\ cos (-\ theta) &=\ cos (\ theta)\ end {align*}

    • Reflexión alrededor\(\pi/4\)

      \ begin {align*}\ sin\ izquierda (\ tfrac {\ pi} {2} -\ theta\ derecha) &=\ cos\ theta &\ cos\ izquierda (\ tfrac {\ pi} {2} -\ theta\ derecha) &=\ sin\ theta\ end {align*}

    • Reflexión alrededor\(\pi/2\)

      \ begin {align*}\ sin\ izquierda (\ pi-\ theta\ derecha) &=\ sin\ theta &\ cos\ izquierda (\ pi-\ theta\ derecha) &=-\ cos\ theta\ end {alinear*}

    • Rotación por\(\pi\)

      \ begin {align*}\ sin\ izquierda (\ theta+\ pi\ derecha) &=-\ sin\ theta &\ cos\ izquierda (\ theta+\ pi\ derecha) &=-\ cos\ theta\ end {alinear*}

    • Pitágoras

      \ begin {align*}\ sen ^2\ theta +\ cos^2\ theta &=1\ end {alinear*}


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