3 years ago

Giving brainlist to whoever answers

Mathematics

2 answers:

SVETLANKA909090 [29]3 years ago

5 0

Answer: I belive b, I could be wrong tho.

Step-by-step explanation:

professor190 [17]3 years ago

5 0

Answer:

I think that the answer is B

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Step-by-step explanation:

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Consider the proof. Given: In △ABC, BD ⊥ AC Prove: the formula for the law of cosines, a2 = b2 + c2 – 2bccos(A) Statement Reason

loris [4]

Solution: The missing reason in Step 8 is substitution of $x=c\cos (A)$ .

Explanation:

The given steps are used to prove the formula for law of cosines.

From step 5 it is noticed that our equation is

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So by substituting $c\cos (A)$ for $x$ in equation (1) we get the equation of step 8, i.e.,

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Hence, the missing reason in Step 8 is substitution of $x=c\cos (A)$ .

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arsen [322]

Answer:

the second one g(x){f(x)=x^(2)-2x-2

Step-by-step explanation:

hope this is right

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