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Rajan Kumar Pasi 5 years, 7 months ago
Q. {tex}\huge {\frac{\cot\ 54^\circ}{\tan\ 36^\circ}+\frac{\tan\ 20^\circ}{\cot\ 70^\circ} -2=?}\\{/tex}
Sol:
| {tex}\huge {=> \ \frac{\cot\ 54^\circ}{\tan\ 36^\circ}+\frac{\tan\ 20^\circ}{\cot\ 70^\circ} -2}\\.\\ \huge {=> \ \frac{\tan\ 36^\circ}{\tan\ 36^\circ}+\frac{\tan\ 20^\circ}{\tan\ 20^\circ} -2}\\.\\ \huge {=> \ 1+1 -2}\\.\\ \huge {=> 0}\\.\\{/tex} | {tex}\Large {\Bigg( {\because\ \cot \ \theta=\tan\ (90^\circ-\theta)\\ \therefore \cot\ 54^\circ=\tan\ (90^\circ-54^\circ)=\tan\ 36^\circ\\ and,\ \cot\ 70^\circ=\tan\ (90^\circ-70^\circ)=\tan\ 20^\circ\Bigg)\\}}{/tex} |
Posted by Mayank Baghel 5 years, 7 months ago
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Kanak Rastogi 5 years, 7 months ago
Posted by Mayank Baghel 5 years, 7 months ago
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Meghna Thapar 5 years, 5 months ago
Homologous series describes organic chemical compounds that have similar structure that only differ by the number of carbon and hydrogen atom that are contained in the main carbon chain.
Methane belongs to the homologous series known as alkanes and it is the simplest of the organic chemical compounds that are in this series.
The alkanes have a general formula of CₐH₂ₐ₊₂ . Where 'a' represents the number of carbon atoms that are in each molecule of the alkane compound, and that are bonded by single bonds to each other and the hydrogen atoms.
You can use the formula CₐH₂ₐ₊₂ to find the second, third, fourth compound of this homologous series, and so on...
The second compound is: a = 2
Therefore CₐH₂ₐ₊₂ = C₂H₍₂ₓ₂₎₊₂
= C₂H₆(ethane)
The third compound will be: (where a = 3)
CₐH₂ₐ₊₂ = C₃H₍₂ₓ₃₎₊₂
= C₃H₈(propane)
Read more on Brainly.in - https://brainly.in/question/1129226#readmore
Posted by Aryan Choure 5 years, 7 months ago
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Sandli Thakur✍?✍?(Helping Hand)? 5 years, 7 months ago
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Potential difference between live wire and neutral wire is 220V. An electric fuse is placed in the path of the phase wire before it is connected to the electric meter.
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Meghna Thapar 5 years, 6 months ago
Oxygen, for plants, is essential because it makes the process of respiration more efficient (known as aerobic respiration). Plant cells are respiring constantly. But, during times when they can't access light, most plants respire more than they photosynthesize, so they take in more oxygen than they produce. Respiration is the process of oxidation of food substances that release carbon dioxide; it takes place throughout the day. Photosynthesis takes place during day in presence of Sunlight only. Hence, plants release oxygen during day only while carbon dioxide is released during night.
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Sonakshi Srivastava 5 years, 7 months ago
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