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Alexxx [7]
3 years ago
14

Wapi simplified an expression. His work is shown below.

Mathematics
2 answers:
posledela3 years ago
8 0

Answer:i did it on edg and i got 100 on test its step 3

Step-by-step explanation:

I got 100 :D

-BARSIC- [3]3 years ago
5 0

Answer:

Step 3

Step-by-step explanation:

7( 8.5-1.5) +8 ÷2

PEMDAS

Parentheses

7*7 +8 ÷2

Then multiplication and division from left to right

49 +8 ÷2

We are still on multiplication and division

49+4

So step 3 is the first mistake

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PLEASE HELP ME I BEG
Kay [80]

Answer:

see explanation

Step-by-step explanation:

Using the trigonometric identity

• 1 + cot²x = csc²x

Consider the left side

csc^{4} x - cot^{4} x

Factorise as a difference of squares

= (csc²x - cot²x)(csc²x + cot²x)

= (1 + cot²x - cot²x)(csc²x + cot²x)

= csc²x + cot²x

= csc²x + csc²x - 1

= 2csc²x - 1 = right side ⇒ verified




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3 years ago
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Answer:

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