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prove cos^2(x)-sin^2(x)=2cos^2(x)-1

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

☐²

x^☐

√☐

^□√☐

□□

log_□

θ

∞

∫

ddx

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

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inverse 2x²−2

Solution

√x+22 , −√x+22

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تعريف دالّة معكوسة

تموضع قيم إكس لقيم واي، فإنّ الدالّة المعكوسة لها تموضع قيم واي لقيم إكس f(x) إذا كانت الدالّة

y=2x²−2

y و x استبدل المتغيّرات

x=2y²−2

x=2y²−2 , y حلّ لـ

√x+22 , −√x+22

Solve instead

domain 2x²−2

range 2x²−2

vertices 2x²−2

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

prove cos^2(x)-sin^2(x)=2cos^2(x)-1

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