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Abhishek Kumar 8 years, 6 months ago
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Posted by Kunal Verma 8 years, 6 months ago
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Rashmi Bajpayee 8 years, 6 months ago
{tex}{{\tan {{80}^ \circ } + \tan {{55}^ \circ }} \over {1 - \tan {{80}^ \circ }.\tan {{55}^ \circ }}} = - 1{/tex}
=> {tex}\tan \left( {{{80}^ \circ } + {{55}^ \circ }} \right) = - 1{/tex}
=> {tex}\tan {135^ \circ } = - 1{/tex}
=> {tex}\tan \left( {{{90}^ \circ } + {{45}^ \circ }} \right) = - 1{/tex}
=> {tex} - \tan {45^ \circ } = - 1{/tex}
=> {tex}-1=-1{/tex}
Hence proved
Posted by Jitendra Singh 8 years, 6 months ago
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Ashutosh Kumar 8 years, 6 months ago
Mirror can be define as a surface, typically of glass coated with a metal amalgam, which reflects a clear image.
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Posted by Dharmveer Sharma 8 years, 7 months ago
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Jyotiraditya Sharma 8 years, 7 months ago
The author wants to say that ravages of time spare none

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Aman Sahani 6 years, 1 month ago
2Thank You