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i am not able to prove most of the identities why its happening

i am not able to prove most of the identities 
why its happening

Grade:12

1 Answers

Drake
277 Points
7 years ago
Just go through the formulas again and learn them by heart . 
Or u could refer a book of arihant . 
 
 
Hit approve if u got even a little help by my answer :)
Thanks .
 
 

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