write an article in 100\-150 words on the following: While going through your old school magazine, you found an interesting article by Ravi Jatav about what it would be like 5 years from now. Complete the magazine article by using your own ideas and thoughts.
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Answer:
on this app???? srry
Explanation:
prove that tan^-1(1/5)+tan^-1(1/3)-tan^-1(21/33) =tan^-1(1/7)
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