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biến đổi laplace cos^2(t)

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

☐²

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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ddx (sin²(x)−cos²(x))

Solution

2sin(2x)

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ddx (sin²(x)−cos²(x))

Rút gọn sin²(x)−cos²(x): −cos(2x)

=ddx (−cos(2x))

Đưa hằng số ra ngoài: (a·f)′=a·f ′

=−ddx (cos(2x))

Áp dụng quy tắc chuỗi: −sin(2x)ddx (2x)

=−sin(2x)ddx (2x)

ddx (2x)=2

=−(−sin(2x)· 2)

Rút gọn

=2sin(2x)

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−▭▭	<	7	8	9	÷	`AC`
+▭▭	>	4	5	6	×	☐☐☐
×▭▭	(	1	2	3	−	`x`
▭ \|▭	)	.	0	=	+	`y`

biến đổi laplace cos^2(t)

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