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sergey [27]
4 years ago
11

Use trigonometric identities to solve tan(2theta)+tan(theta)=0 exactly for 0

Chemistry
1 answer:
hoa [83]4 years ago
4 0
Tan2(∅) ≡ 2tan(∅) / (1 - tan²∅)

Thus,
2tan(∅) / (1 - tan²(∅)) + tan(∅) = 0
2tan(∅) / (1 - tan²(∅)) = -tan(∅)
1 - tan²(∅) = -2
tan²(∅) = 3
∅ = tan⁻¹(√3)
∅ = 4nπ/3
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Which of the following is not an example of an electrolytic solution? a sports drink sweat ocean water pure water
zzz [600]

Answer: Option (d) is the correct answer.

Explanation:

An electrolytic solution which is conductive in nature, that is, a solution that has ions or atoms.

In the given options, sports drink, sweat, and ocean water are all electrolytic solution.

Whereas pure water has pH equals to 7, that is, pure water is neutral. Thus, we can conclude that pure water is not an example of an electrolytic solution.

7 0
3 years ago
Carbohydrate metabolic enzymes bind D-glucose specifically. D-glucose has an estimated caloric value of 1 k.cal per 4 grams of c
Aleksandr [31]

Answer:

D) 0 k.cal per 4 grams

Explanation:

Genarally, glucose can be classified into two enantiomers such as d-glucose and l-glucose. The d-glucose is the most common sugar that bodies of living organisms use as source of energy. However, l-glucose is an organic compound and it is one of the aldohexose monosaccharides. It is the l-isomer of glucose and commonly refer to as a low-calorie sweetener. The l-glucose is  relatively indistinguishable in taste from d-glucose but cannot be used as a source of energy. Therefore, in the given problem:

if d-glucose has an estimated caloric value of 1 k.cal per 4 grams of carbohydrate, then the caloric value of l-glucose will be 0 k.cal per 4 grams.

3 0
3 years ago
What is the SI unit of time?<br> OA.<br> second<br> OB.<br> minute<br> OC. hour<br> OD. day<br> Res
BARSIC [14]

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

The correct choice is ~ A

S.I unit of time is <u>Second</u>

7 0
3 years ago
What does the J.J.Thomson model represent?
Korvikt [17]

Answer:

J.J. Thomsons model represents the structure of an atom.

J.J. Thomson's experiments with cathode-ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged particles.

3 0
3 years ago
if the velocity of a moving car increases from 9.0 m/s to 25.0 m/s in the span of 5.0 seconds, what is the average acceleration
nirvana33 [79]

Answer:

3.5m/s²

Explanation:

Logic...

8 0
3 years ago
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