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амплитуда 2cos(3x)

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

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

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доказывать csc(2x)=sec(x)2sin(x)

Solution

Верно

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csc(2x)=sec(x)2sin(x)

Манипуляции с левой стороны

csc(2x)

Выразите с помощью синуса (sin), косинуса (cos)

=1sin(2x)

Перепишите используя тригонометрические тождества

=12sin(x)cos(x)

Перепишите используя тригонометрические тождества

sec(x)2sin(x)

Мы показали, что две стороны могут принимать одинаковую форму

⇒ Верно

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

амплитуда 2cos(3x)

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