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adelina 88 [10]
3 years ago
6

2(b + c)2-3 (b - c)? if b = 8 and c ==-4​

Mathematics
1 answer:
finlep [7]3 years ago
3 0

Answer:

96

Step-by-step explanation:

= 2(b+c)2-3(b-c)

= 2(8+4)2-3(8-4)

= 2(8+4)1(8-4)

= 2×12×1×4

= 96 ans

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Obon
SVETLANKA909090 [29]

Answer:

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3 0
3 years ago
prove that sin theta cos theta = cot theta is not a trigonometric identity by producing a counterexample
Zolol [24]

Answer:

To prove that ( sin θ cos θ = cot θ ) is not a trigonometric identity.

Begin with the right hand side:

R.H.S = cot θ = \frac{cos \ \theta}{sin \ \theta}

L.H.S = sin θ cos θ

so, sin θ cos θ ≠ \frac{cos \ \theta}{sin \ \theta}

So, the equation is not a trigonometric identity.

=========================================================

<u>Anther solution:</u>

To prove that ( sin θ cos θ = cot θ ) is not a trigonometric identity.

Assume θ with a value and substitute with it.

Let θ = 45°

So, L.H.S = sin θ cos θ = sin 45° cos 45° = (1/√2) * (1/√2) = 1/2

R.H.S = cot θ = cot 45 = 1

So, L.H.S ≠ R.H.S

So, sin θ cos θ = cot θ is not a trigonometric identity.

5 0
2 years ago
Giving brainiest pls help
Rudik [331]

Answer:

Ivan: 4

Caleb: 4, 4, 4, 4, 4, 4, 4

Step-by-step explanation:

For every 4 Ivan sees, Caleb sees 28. (4 times 7)

7 0
2 years ago
Which equation is not equivalent to 2x+10=-8
Vlada [557]

Answer:

2x+10=-8

x=9

3x=9

x=3

2x=8

x=4

4x=20

x=5

Step-by-step explanation:

4 0
3 years ago
HELP P PICTURE IS SHOWN
Zepler [3.9K]
X would be 6 since
35 ÷ 5= 7
then you'd divide
42 ÷ 7 and get 6
3 0
3 years ago
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