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 >

((60)^2*sin(30))/(9.8)

解答

\frac{( 60 ) ^{2} \cdot sin ( 3 0 ^{\circ} )}{9.8}

解答

\frac{9000}{49}

+1

十进制

183.67346 \dots

求解步骤

\frac{( 60 ) ^{2} sin ( 3 0 ^{\circ} )}{9.8}

= \frac{6 0 ^{2} sin ( 3 0 ^{\circ} )}{\frac{49}{5}}

使用以下普通恒等式:

sin (3 0^{\circ}) = \frac{1}{2}

sin (3 0^{\circ})

sin (x)

周期表（周期为

36 0^{\circ} n

"）：

x 0 3 0^{\circ} 4 5^{\circ} 6 0^{\circ} 9 0^{\circ} 12 0^{\circ} 13 5^{\circ} 15 0^{\circ} sin (x) 0 \frac{1}{2} \frac{2}{2} \frac{3}{2} 1 \frac{3}{2} \frac{2}{2} \frac{1}{2} x 18 0^{\circ} 21 0^{\circ} 22 5^{\circ} 24 0^{\circ} 27 0^{\circ} 30 0^{\circ} 31 5^{\circ} 33 0^{\circ} sin (x) 0 - \frac{1}{2} - \frac{2}{2} - \frac{3}{2} - 1 - \frac{3}{2} - \frac{2}{2} - \frac{1}{2}

= \frac{1}{2}

= \frac{6 0 ^{2} \cdot \frac{1}{2}}{\frac{49}{5}}

化简

\frac{6 0 ^{2} \cdot \frac{1}{2}}{\frac{49}{5}} : \frac{9000}{49}

\frac{6 0 ^{2} \cdot \frac{1}{2}}{\frac{49}{5}}

使用分式法则:

\frac{a}{\frac{b}{c}} = \frac{a \cdot c}{b}

= \frac{6 0 ^{2} \cdot \frac{1}{2} \cdot 5}{49}

6 0^{2} \cdot \frac{1}{2} \cdot 5 = 18000 \cdot \frac{1}{2}

6 0^{2} \cdot \frac{1}{2} \cdot 5

6 0^{2} = 3600

= 3600 \cdot 5 \cdot \frac{1}{2}

数字相乘:

3600 \cdot 5 = 18000

= 18000 \cdot \frac{1}{2}

= \frac{18000 \cdot \frac{1}{2}}{49}

乘

18000 \cdot \frac{1}{2} : 9000

18000 \cdot \frac{1}{2}

分式相乘:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

= \frac{1 \cdot 18000}{2}

数字相乘:

1 \cdot 18000 = 18000

= \frac{18000}{2}

数字相除:

\frac{18000}{2} = 9000

= 9000

= \frac{9000}{49}

= \frac{9000}{49}

流行的例子

10 cos (1 5^{\circ})

2sin(pi/3)sin(pi/4)

2 sin (\frac{π}{3}) sin (\frac{π}{4})

(sin(300)+cos(150))/(tan(120)+cot(240))

\frac{sin ( 30 0 ^{\circ} ) + cos ( 15 0 ^{\circ} )}{tan ( 12 0 ^{\circ} ) + cot ( 24 0 ^{\circ} )}

sin(pi/4)cos(pi/3)-cos(pi/4)sin(pi/3)

sin (\frac{π}{4}) cos (\frac{π}{3}) - cos (\frac{π}{4}) sin (\frac{π}{3})

4983 \cdot cos (4 0^{\circ})