zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的三角函数 >

7sec(θ)=-9.2

解答

7 sec (θ) = - 9.2

解答

θ = 2.43544 \dots + 2 πn, θ = - 2.43544 \dots + 2 πn

+1

度数

θ = 139.54091 \dots^{\circ} + 36 0^{\circ} n, θ = - 139.54091 \dots^{\circ} + 36 0^{\circ} n

求解步骤

7 sec (θ) = - 9.2

两边除以

7

7 sec (θ) = - 9.2

两边除以

7

\frac{7 sec ( θ )}{7} = \frac{- 9.2}{7}

化简

\frac{7 sec ( θ )}{7} = \frac{- 9.2}{7}

化简

\frac{7 sec ( θ )}{7} : sec (θ)

\frac{7 sec ( θ )}{7}

数字相除:

\frac{7}{7} = 1

= sec (θ)

化简

\frac{- 9.2}{7} : - 1.31428 \dots

\frac{- 9.2}{7}

使用分式法则:

\frac{- a}{b} = - \frac{a}{b}

= - \frac{9.2}{7}

数字相除:

\frac{9.2}{7} = 1.31428 \dots

= - 1.31428 \dots

sec (θ) = - 1.31428 \dots

sec (θ) = - 1.31428 \dots

sec (θ) = - 1.31428 \dots

使用反三角函数性质

sec (θ) = - 1.31428 \dots

sec (θ) = - 1.31428 \dots

的通解

sec (x) = - a \Rightarrow x = arcsec (- a) + 2 πn, x = - arcsec (- a) + 2 πn

θ = arcsec (- 1.31428 \dots) + 2 πn, θ = - arcsec (- 1.31428 \dots) + 2 πn

θ = arcsec (- 1.31428 \dots) + 2 πn, θ = - arcsec (- 1.31428 \dots) + 2 πn

以小数形式表示解

θ = 2.43544 \dots + 2 πn, θ = - 2.43544 \dots + 2 πn

作图

流行的例子

cos(x)=(3sqrt(3))/(2pi)

cos (x) = \frac{3 3}{2 π}

(sin(b))/(19)=(sin(74))/(19)

\frac{sin ( b )}{19} = \frac{sin ( 7 4 ^{\circ} )}{19}

- 8 cos^{2} (x) + 6 = 2

sin (x) = \frac{10}{20}

(sin(x)+cos(x))/(sin(x))=1-1/(tan(x))

\frac{sin ( x ) + cos ( x )}{sin ( x )} = 1 - \frac{1}{tan ( x )}