What is the value of cosh(2pi) ?

The value of cosh(2pi) is (e^{4pi}+1)/(2e^{2pi)}

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cosh(2pi)

cosh (2 π)

\frac{e ^{4 π} + 1}{2 e ^{2 π}}

Decimal

267.74676 \dots

Solution steps

cosh (2 π)

Use the Hyperbolic identity:

cosh (x) = \frac{e ^{x} + e ^{- x}}{2}

= \frac{e ^{2 π} + e ^{- 2 π}}{2}

\frac{e ^{2 π} + e ^{- 2 π}}{2} = \frac{e ^{4 π} + 1}{2 e ^{2 π}}

\frac{e ^{2 π} + e ^{- 2 π}}{2}

Apply exponent rule:

a^{- b} = \frac{1}{a ^{b}}

= \frac{e ^{2 π} + \frac{1}{e ^{2 π}}}{2}

Join

e^{2 π} + \frac{1}{e ^{2 π}} : \frac{e ^{4 π} + 1}{e ^{2 π}}

e^{2 π} + \frac{1}{e ^{2 π}}

Convert element to fraction:

e^{2 π} = \frac{e ^{2 π} e ^{2 π}}{e ^{2 π}}

= \frac{e ^{2 π} e ^{2 π}}{e ^{2 π}} + \frac{1}{e ^{2 π}}

Since the denominators are equal, combine the fractions:

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

= \frac{e ^{2 π} e ^{2 π} + 1}{e ^{2 π}}

e^{2 π} e^{2 π} + 1 = e^{4 π} + 1

e^{2 π} e^{2 π} + 1

e^{2 π} e^{2 π} = e^{4 π}

e^{2 π} e^{2 π}

Apply exponent rule:

a^{b} \cdot a^{c} = a^{b + c}

e^{2 π} e^{2 π} = e^{2 π + 2 π}

= e^{2 π + 2 π}

Add similar elements:

2 π + 2 π = 4 π

= e^{4 π}

= e^{4 π} + 1

= \frac{e ^{4 π} + 1}{e ^{2 π}}

= \frac{\frac{e ^{4 π} + 1}{e ^{2 π}}}{2}

Apply the fraction rule:

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

= \frac{e ^{4 π} + 1}{e ^{2 π} \cdot 2}

= \frac{e ^{4 π} + 1}{2 e ^{2 π}}

What is the value of cosh(2pi) ?
The value of cosh(2pi) is (e^{4pi}+1)/(2e^{2pi)}