domain of sin(3x)

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`x`²	`x`^□	log_□	√☐	^□√☐	≤	≥	□□	·	÷	`x`^◦	π
(☐)^′	`ddx`	∂∂`x`	∫	∫_□^□	lim	∑	∞	`θ`	(`f` ◦ `g`)	`f`(`x`)

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ddx

≥	≤	·	÷	`x`^◦	(☐)	\|☐\|	(`f` ◦ `g`)	`f`(`x`)	ln	`e`^☐
(☐)^′	∂∂`x`	∫_□^□	lim	∑	sin	cos	tan	cot	csc	sec

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Steps Examples

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laplace transform cos²(t)

Solution

12s +s2(s²+4)

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Solution steps

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L{cos²(t)}

Use the following identity: cos²(x)=12 +cos(2x)12

=L{12 +cos(2t)12 }

Use the linearity property of Laplace Transform:
For functions f(t), g(t) and constants a, b: L{a·f(t)+b·g(t)}=a·L{f(t)}+b·L{g(t)}

=L{12 }+12 L{cos(2t)}

L{12 }: 12s

L{cos(2t)}: ss²+4

=12s +12 · ss²+4

Refine 12s +12 · ss²+4 : 12s +s2(s²+4)

=12s +s2(s²+4)

Solve instead

inverse laplace cos²(t)

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