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prove (sin(2x))/(sin(x))-(cos(2x))/(cos(x))=sec(x)

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

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log_□

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ddx

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

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prove tan²(x)−1sec²(x) =tan(x)−cot(x)tan(x)+cot(x)

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tan²(x)−1sec²(x) =tan(x)−cot(x)tan(x)+cot(x)

עבוד על אגף שמאל

tan²(x)−1sec²(x)

sin, cos :בטא באמצאות

=−cos²(x)+sin²(x)

עבוד על אגף ימין

tan(x)−cot(x)tan(x)+cot(x)

sin, cos :בטא באמצאות

=−cos²(x)+sin²(x)cos²(x)+sin²(x)

Rewrite using trig identities

=−cos²(x)+sin²(x)

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היי, לשאול שאלה לגבי prove tan²(x)−1sec²(x) =tan(x)−cot(x)tan(x)+cot(x) או בחר מבין האפשרויות למטה

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

prove (sin(2x))/(sin(x))-(cos(2x))/(cos(x))=sec(x)

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