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受欢迎的代数 >

solvefor x,x+5cosx=0

解答

求解

x, x + 5 cos (x) = 0

解答

x \approx - 1.30644

+1

度数

x = - 74.85349 \dots^{\circ}

求解步骤

x + 5 cos (x) = 0

Find the interval where both equation sides share the same range:

- 5 \leq x \leq 5

- 5 \leq x \leq 5

Find the difference function:

x + 5 cos (x)

x + 5 cos (x)

Extreme points of

x + 5 cos (x)

at

- 5 \leq x \leq 5

(- 5, - 5 + 5 cos (5)), (- π - arcsin (\frac{1}{5}), - π - arcsin (\frac{1}{5}) + 5 cos (π + arcsin (\frac{1}{5}))), (arcsin (\frac{1}{5}), arcsin (\frac{1}{5}) + 26), (π - arcsin (\frac{1}{5}), π - arcsin (\frac{1}{5}) + 5 cos (π - arcsin (\frac{1}{5}))), (5, 5 + 5 cos (5))

Find the x-axis intersections

x \approx - 1.30644, x \approx 1.97738, x \approx 3.83747

因为方程对以下值无定义:

1.97738, 3.83747

x \approx - 1.30644

作图

流行的例子

(4x+7)/3+2=(7x)/2

\frac{4 x + 7}{3} + 2 = \frac{7 x}{2}

3 (7 + 2 a) + 2 a = 33

1 - \frac{x}{2} = \frac{x}{3}

3.9 = \frac{x}{8}

3 = \frac{p}{- 5} + 1