Precálculo Ejemplos

$20 \sum_{x = 0}^{3} | \sin (2.8 π x) \cdot \sin (3.48 π x) |$

Paso 1

Simplifica la suma.

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Paso 1.1

Multiplica $2.8$ por $π$ .

$| \sin (8.79645943 x) \cdot \sin (3.48 π x) |$

Paso 1.2

Multiplica $3.48$ por $π$ .

$| \sin (8.79645943 x) \sin (10.93274243 x) |$

Paso 1.3

Reescribe la suma.

$20 \sum_{x = 0}^{3} | \sin (8.79645943 x) \sin (10.93274243 x) |$

Paso 2

Expande la serie para cada valor de $x$ .

$20 (| \sin (8.79645943 \cdot 0) \sin (10.93274243 \cdot 0) | + | \sin (8.79645943 \cdot 1) \sin (10.93274243 \cdot 1) | + | \sin (8.79645943 \cdot 2) \sin (10.93274243 \cdot 2) | + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3

Simplifica.

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Paso 3.1

Evalúa $\sin (8.79645943 \cdot 0)$ .

$20 (| 0 \sin (10.93274243 \cdot 0) | + | \sin (8.79645943 \cdot 1) \sin (10.93274243 \cdot 1) | + | \sin (8.79645943 \cdot 2) \sin (10.93274243 \cdot 2) | + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.2

Evalúa $\sin (10.93274243 \cdot 0)$ .

$20 (| 0 \cdot 0 | + | \sin (8.79645943 \cdot 1) \sin (10.93274243 \cdot 1) | + | \sin (8.79645943 \cdot 2) \sin (10.93274243 \cdot 2) | + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.3

Multiplica $0$ por $0$ .

$20 (| 0 | + | \sin (8.79645943 \cdot 1) \sin (10.93274243 \cdot 1) | + | \sin (8.79645943 \cdot 2) \sin (10.93274243 \cdot 2) | + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.4

El valor absoluto es la distancia entre un número y cero. La distancia entre $0$ y $0$ es $0$ .

$20 (0 + | \sin (8.79645943 \cdot 1) \sin (10.93274243 \cdot 1) | + | \sin (8.79645943 \cdot 2) \sin (10.93274243 \cdot 2) | + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.5

Evalúa $\sin (8.79645943 \cdot 1)$ .

$20 (0 + | 0.58778525 \sin (10.93274243 \cdot 1) | + | \sin (8.79645943 \cdot 2) \sin (10.93274243 \cdot 2) | + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.6

Evalúa $\sin (10.93274243 \cdot 1)$ .

$20 (0 + | 0.58778525 \cdot 0.18965656 | + | \sin (8.79645943 \cdot 2) \sin (10.93274243 \cdot 2) | + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.7

Multiplica $0.58778525$ por $0.18965656$ .

$20 (0 + | 0.11147733 | + | \sin (8.79645943 \cdot 2) \sin (10.93274243 \cdot 2) | + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.8

El valor absoluto es la distancia entre un número y cero. La distancia entre $0$ y $0.11147733$ es $0.11147733$ .

$20 (0 + 0.11147733 + | \sin (8.79645943 \cdot 2) \sin (10.93274243 \cdot 2) | + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.9

Suma $0$ y $0.11147733$ .

$20 (0.11147733 + | \sin (8.79645943 \cdot 2) \sin (10.93274243 \cdot 2) | + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.10

Evalúa $\sin (8.79645943 \cdot 2)$ .

$20 (0.11147733 + | 0.30225208 \sin (10.93274243 \cdot 2) | + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.11

Evalúa $\sin (10.93274243 \cdot 2)$ .

$20 (0.11147733 + | 0.30225208 \cdot 0.37242878 | + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.12

Multiplica $0.30225208$ por $0.37242878$ .

$20 (0.11147733 + | 0.11256737 | + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.13

El valor absoluto es la distancia entre un número y cero. La distancia entre $0$ y $0.11256737$ es $0.11256737$ .

$20 (0.11147733 + 0.11256737 + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.14

Suma $0.11147733$ y $0.11256737$ .

$20 (0.2240447 + | \sin (8.79645943 \cdot 3) \sin (10.93274243 \cdot 3) |)$

Paso 3.15

Evalúa $\sin (8.79645943 \cdot 3)$ .

$20 (0.2240447 + | 0.44446912 \sin (10.93274243 \cdot 3) |)$

Paso 3.16

Evalúa $\sin (10.93274243 \cdot 3)$ .

$20 (0.2240447 + | 0.44446912 \cdot 0.5416822 |)$

Paso 3.17

Multiplica $0.44446912$ por $0.5416822$ .

$20 (0.2240447 + | 0.24076101 |)$

Paso 3.18

El valor absoluto es la distancia entre un número y cero. La distancia entre $0$ y $0.24076101$ es $0.24076101$ .

$20 (0.2240447 + 0.24076101)$

Paso 3.19

Suma $0.2240447$ y $0.24076101$ .

$20 \cdot 0.46480572$

Paso 3.20

Multiplica $20$ por $0.46480572$ .

$9.29611442$