erweitern cos(4t)h(t-(7pi)/4)

Lösung

erweitern

cos (4 t) h (t - \frac{7 π}{4})

t h cos (4 t) - \frac{7 πh cos ( 4 t )}{4}

Schritte zur Lösung

cos (4 t) h (t - \frac{7 π}{4})

= h cos (4 t) (t - \frac{7 π}{4})

Wende das Distributivgesetz an:

a (b - c) = ab - a c

a = cos (4 t) h, b = t, c = \frac{7 π}{4}

= cos (4 t) h t - cos (4 t) h \frac{7 π}{4}

= t h cos (4 t) - \frac{7 π}{4} h cos (4 t)

Vereinfache

t h cos (4 t) - \frac{7 π}{4} h cos (4 t) : t h cos (4 t) - \frac{7 πh cos ( 4 t )}{4}

= t h cos (4 t) - \frac{7 πh cos ( 4 t )}{4}

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