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3 years ago

Please explain the following in a few written sentences.

Mathematics

1 answer:

Y_Kistochka [10]3 years ago

3 0

Answer:

It's a mnemonic device to help you remember the three basic trig ratios used to solve for missing sides and angles in a right triangle.

Step-by-step explanation:

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guapka [62]

Answer:

just trying to get the points

Step-by-step explanation:

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4 years ago

Meg has a can that contains 80% of orange juice and the rest water. The can has 1 liter of water.

Anestetic [448]

B) Since 80% is orange juice so you know that 20% is water. And it says there is 1L water. Therefore 20% = 1. (4) X 20%=1 X (4) The answer is 4L of orange juice.

A) I am not sure Sorry.

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3 years ago

Prove the identity cos(x-y)-cos(x+y)=2sinxsiny

tekilochka [14]

Answer:

see the procedure

Step-by-step explanation:

we know that

$cos(X - Y) = cosX cosY + sinX sinY\\cos(X + Y) = cosX cosY - sinX sinY$

$cos(X - Y)-cos(X + Y)=cosX cosY + sinX sinY-(cosX cosY - sinX sinY)$

$cos(X - Y)-cos(X + Y)=cosX cosY + sinX sinY-cosX cosY + sinX sinY$

$cos(X - Y)-cos(X + Y)=sinX sinY+ sinX sinY$

$cos(X - Y)-cos(X + Y)=2sinX sinY$ ----> is verified

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3 years ago

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Anna007 [38]

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3 years ago

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X - 4 = 9<br> Can someone please help me

mihalych1998 [28]

Answer:

x=13

Step-by-step explanation:

isolate the x by adding4 to each side of the equation

x - 4 = 9

+ 4 =+ 4

and then the -4 cancels out and you get x = 13

I hope this helps :)

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3 years ago

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