notazione scientifica (2.110^4+3.0210^5)-8.103*10^5

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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

simplify solve for inverse tangent line

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cos((−660)^◦)

Solution

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0.5

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cos(−660^◦)

Use the following property: cos(−x)=cos(x)

cos(−660^◦)=cos(660^◦)

=cos(660^◦)

cos(660^◦)=cos(300^◦)

=cos(300^◦)

Rewrite using trig identities: cos(180^◦)cos(120^◦)−sin(180^◦)sin(120^◦)

=cos(180^◦)cos(120^◦)−sin(180^◦)sin(120^◦)

Use the following trivial identity: cos(180^◦)=(−1)

Use the following trivial identity: cos(120^◦)=−12

Use the following trivial identity: sin(180^◦)=0

Use the following trivial identity: sin(120^◦)=√32

=(−1)(−12 )−0· √32

Simplify

=12

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

notazione scientifica (2.1*10^4+3.02*10^5)-8.103*10^5

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notazione scientifica (2.110^4+3.0210^5)-8.103*10^5