What is expand (-9sin(t)+9sin(9t))^2 ?

The solution to expand (-9sin(t)+9sin(9t))^2 is 81sin^2(t)-162sin(t)sin(9t)+81sin^2(9t)

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expand (-9sin(t)+9sin(9t))^2

expand

(- 9 sin (t) + 9 sin (9 t))^{2}

81 sin^{2} (t) - 162 sin (t) sin (9 t) + 81 sin^{2} (9 t)

Solution steps

(- 9 sin (t) + 9 sin (9 t))^{2}

Apply Perfect Square Formula:

(a + b)^{2} = a^{2} + 2 ab + b^{2}

(- 9 sin (t) + 9 sin (9 t))^{2} = (- 9 sin (t))^{2} + 2 (- 9 sin (t)) \cdot 9 sin (9 t) + (9 sin (9 t))^{2}

= (- 9 sin (t))^{2} + 2 (- 9 sin (t)) \cdot 9 sin (9 t) + (9 sin (9 t))^{2}

Simplify

(- 9 sin (t))^{2} + 2 (- 9 sin (t)) \cdot 9 sin (9 t) + (9 sin (9 t))^{2} : 81 sin^{2} (t) - 162 sin (t) sin (9 t) + 81 sin^{2} (9 t)

= 81 sin^{2} (t) - 162 sin (t) sin (9 t) + 81 sin^{2} (9 t)

e^{- t} + (- 1 - e^{- t}) U (t - 5)

4.408904562 \cdot 1 0^{36}

\frac{8 π ( 2 - 2 )}{3}

\frac{e}{3 ( n + 1 ) ( 3 n + 2 ) ( 3 n + 1 )}

(x - 2 + i)^{2}

What is expand (-9sin(t)+9sin(9t))^2 ?
The solution to expand (-9sin(t)+9sin(9t))^2 is 81sin^2(t)-162sin(t)sin(9t)+81sin^2(9t)