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2 years ago

Help on math aging sry if this is to much middle school question

Mathematics

2 answers:

icang [17]2 years ago

8 0

12/35
brainliest plss

lys-0071 [83]2 years ago

4 0

Answer:

12/35

Step-by-step explanation:

To divide fractions, simply flip the last fraction. This is called the reciprocal.

2/7 divided by 5/6 = 2/7 * 6/5

multiply the numerator by the numerator, and the denominator by the denominator. This gives us 12/35

Hope this helped <3

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zubka84 [21]

Answer:

See Explanation Below

Step-by-step explanation:

Given

$(sin x - cos x)^2 = sec^2x - tan^2x - 2sinx.cos x.$

Required

Prove

To start with; we open the bracket on the left hand side

$(sin x - cos x)^2 = (sin x - cos x)(sin x - cos x)$

$(sin x - cos x)^2 = (sin x )(sin x - cos x)- (cos x)(sin x - cos x)$

$(sin x - cos x)^2 = sin^2 x -sinx cos x - sin xcos x + cos^2 x$

$(sin x - cos x)^2 = sin^2 x -2sinx cos x + cos^2 x$

Reorder

$(sin x - cos x)^2 = sin^2 x + cos^2 x - 2sinx cos x$

From trigonometry;

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So;

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becomes

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Also from trigonometry;

$sec^2x - tan^2x = 1$

So,

$(sin x - cos x)^2 = 1 - 2sinx cos x$

becomes

$(sin x - cos x)^2 = sec^2x - tan^2x - 2sinx cos x$

Proved

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