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2 years ago

Prove that : sin^4(2x)=3/8-1/2cos4x+1/8cos8x Someone plzz help!!!

1 answer:

7 0

Sin^2 (2x) = (1 - cos(4x))/2
---> sin^4 (2x) = (1/4)(1 - cos4x)^2 = (1/4)(1 - 2cos4x + cos^2 (4x)) and replace cos^2(4x) by (1/2)(1+cos(8x)) --->answer

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allochka39001 [22]

Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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2 years ago

A cylinder has a radius of 4x + 3 and a height of 3x + 6. Which polynomial in standard form best

MrRa [10]

Answer:

Step-by-step explanation:

R=4x+3

H=3x+6

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inserting the parameters

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2 years ago

hram777 [196]

Answer:

D: x < 20

Step-by-step explanation:

-4x + 16 > -64

subtract 16 from both sides because you must isolate x.

-4x + 16 - 16 > -64 - 16

-4x > -80

Then divide -4 on both sides... I believe that when you divide a number by a negative number you must flip the sign...

-4x/ -4 < -80/ -4

x < 20

(negative divided by a negative will result in a POSITIVE.)

Hope this helped... I truly apologize if this is wrong..

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2 years ago