3 years ago

A(n)= - 3+ (n = 1)(6) Answer please help .

Mathematics

1 answer:

balu736 [363]3 years ago

3 0

Answer:

I also need some help!!!!

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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;

$sin^2x + cos^2x = 1$

So;

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

becomes

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

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

3 0

3 years ago

Plz, Help me with this!!!!

yanalaym [24]

It’s 152y+125, basically by simplifying

6 0

2 years ago

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Choose correct response

Illusion [34]

Answer:

Step-by-step explanation:

11.1/0.01=11.1*100=1110

7 0

2 years ago

27(n+4)+18n=7(n-18)-40n So confused can yall help me?

Sedbober [7]

Answer:

this is your answer!! n=-3

Step-by-step explanation:

hoped i was able to help thank u can i get brainiest pls:)

5 0

2 years ago

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If 4C + 3 = 15, what is the value of C?

Soloha48 [4]

4c+3=15
You need to get rid of the 3
So you minus it from each side so you
4c=12
12/4=3
So c =3

4 0

3 years ago

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