2 years ago

Which part of systems theory is anything that pinpoints problems in a system before the output is complete?

1 answer:

6 0

Answer:

A system is a group of individual parts that work together to form a unified whole. ... The final product or service provided by a system. Feedback loop. A process of monitoring outputs to determine whether or not the system is working.

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Prove sinA*cos2A=1/4sin4A*secA<br>

kolezko [41]

Answer:

The prove is below

Explanation:

From trigonometric identities:

$cos2A=cos(A+A)=cos^2A-sin^2A\\sin2A=sin(A+A)=2sinAcosA\\sin4A=sin(2A+2A)=2sin2Acos2A=2(2sinAcosA)(cos^2A-sin^2A)=4sinAcos^3A-4cosAsin^3A\\secA=\frac{1}{cosA}$

Therefore:

$\frac{1}{4}sin4AsecA = \frac{1}{4}( 4sinAcos^3A-4cosAsin^3A)\frac{1}{cosA}\\= sinAcos^3A-cosAsin^3A(\frac{1}{cosA} )\\=sinAcos^2-sin^3A\\=sinA(cos^2A-sin^2A)\\But\ cos^2A-sin^2A=cos2A\\Therefore:sinA(cos^2A-sin^2A)=sinAcos2A\\\frac{1}{4}sin^4Acos2A=sinAcos2A$

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2 years ago

Mary wants to serve dessert at 1300. If it takes 30 minutes to prepare the cake, one hour to bake it, and 15 minutes to cool, at

miss Akunina [59]

Answer:

9:30 AM.

Explanation:

This gives Mary the grace of 3 hours 30 minutes before 13:00 when she will serve dessert.

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Make friends in after-school sports or clubs.

This will help you engage in activities you like as well as be in a supportive environment of like-minded people, which can reduce susceptibility to peer pressure.

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A, B, and C are all correct answers

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