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受欢迎的三角函数 >

sec^2(45)(pi/(180))*1

解答

sec^{2} (4 5^{\circ}) (\frac{π}{180}) \cdot 1

解答

\frac{π}{90}

+1

十进制

0.03490 \dots

求解步骤

sec^{2} (4 5^{\circ}) (1^{\circ}) \cdot 1

= sec^{2} (4 5^{\circ}) 1^{\circ} \cdot 1

使用以下普通恒等式:

sec (4 5^{\circ}) = 2

sec (4 5^{\circ})

sec (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} sec (x) 1 \frac{2 3}{3} 22 Undefined - 2 - 2 - \frac{2 3}{3} 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} sec (x) - 1 - \frac{2 3}{3} - 2 - 2 Undefined 22 \frac{2 3}{3}

= 2

= (2)^{2} 1^{\circ} \cdot 1

化简

(2)^{2} 1^{\circ} \cdot 1 : 2^{\circ}

(2)^{2} 1^{\circ} \cdot 1

(2)^{2} = 2

(2)^{2}

使用根式运算法则:

a = a^{\frac{1}{2}}

= (2^{\frac{1}{2}})^{2}

使用指数法则:

(a^{b})^{c} = a^{b c}

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

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

\frac{1}{2} \cdot 2

分式相乘:

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

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

约分:

2

= 1

= 2

= 2 \cdot 1 \cdot 1^{\circ}

分式相乘:

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

= 1 \cdot 2^{\circ}

约分:

2

= 1 \cdot 2^{\circ}

乘以:

1 \cdot 2^{\circ} = 2^{\circ}

= 2^{\circ}

= 2^{\circ}

流行的例子

(9sin(31))/(tan(55))

\frac{9 sin ( 3 1 ^{\circ} )}{tan ( 5 5 ^{\circ} )}

cos (74.4 9^{\circ})

cos (74. 5^{\circ})

sin (- \frac{14 π}{3})

sqrt((1+cos(5/13))/2)

\frac{1 + cos ( \frac{5}{13} )}{2}