What is the value of -2(-2sech^2(0)tanh^2(0)+sech^4(0)) ?

The value of -2(-2sech^2(0)tanh^2(0)+sech^4(0)) is -2

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-2(-2sech^2(0)tanh^2(0)+sech^4(0))

- 2 (- 2 sech^{2} (0) tanh^{2} (0) + sech^{4} (0))

- 2

Solution steps

- 2 (- 2 sech^{2} (0) tanh^{2} (0) + sech^{4} (0))

Rewrite using trig identities:

sech (0) = 1

sech (0)

Use the Hyperbolic identity:

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

= \frac{2}{e ^{0} + e ^{- 0}}

Simplify

= 1

Rewrite using trig identities:

tanh (0) = 0

tanh (0)

Use the Hyperbolic identity:

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

= \frac{e ^{0} - e ^{- 0}}{e ^{0} + e ^{- 0}}

Simplify

= 0

= - 2 (- 2 \cdot 1^{2} \cdot 0^{2} + 1^{4})

Simplify

= - 2

arctan (0.67)

\frac{sin ^{3} ( \frac{π}{2} )}{3}

sin (20. 5^{\circ})

sin (arctan (- 1) + arcsin (- \frac{2}{2}))

tan (\frac{- 159 0 ^{\circ}}{3 cot ^{2} ( 6 0 ^{\circ} )})

What is the value of -2(-2sech^2(0)tanh^2(0)+sech^4(0)) ?
The value of -2(-2sech^2(0)tanh^2(0)+sech^4(0)) is -2