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Natalija [7]
2 years ago
9

Please solve fast please​

Mathematics
1 answer:
Usimov [2.4K]2 years ago
4 0

Answer:

see explanation

Step-by-step explanation:

Using identities

sec²x = tan²x + 1

cosec²x = cot²x + 1

cos²x = \frac{1}{cos^2x}

(1)

sin²θ + \frac{1}{sec^20}

= sin²θ + cos²θ = 1

(2)

9sec²θ - 9tan²θ

= 9sec²θ - 9(sec²θ - 1)

= 9sec²θ - 9sec²θ + 9

= 9

(3)

- 8cot²A + 8cosec²A

= - 8cot²A + 8(cot²A + 1)

= - 8cot²A + 8cot²A + 8

= 8

(4)

- 10cosec²β + 10cot²β

= - 10(cot²β + 1) + 10cot²β

= - 10cot²β - 10 + 10cot²β

= - 10

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The correct answer is:  " √x  −  <span>2√b " .
</span>_________________________________________________________

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_________________________________________________________

Explanation:
_________________________________________________________
      In an expression with 2 (TWO) terms;  that is, in a "binomial expression", 
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      →  So:  We are given:  " <span>√x + 2√b " .
</span>
      →  Note that this is a "binomial expression" ;

      →  that is, there are 2 (TWO) terms:  " <span>√x " ; and:  " 2√b " .
_________________________________________________________

To find the "conjugate" of the given binomial expression:

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     </span>→  " √x − 2√b "  ; 

     →  which is the "conjugate" ; and is the correct answer:
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</span>→  {that is:  " √x − 2√b " ;  is the conjugate.}.
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