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please answer above questions with step by step please answer it as soon as possible

please answer above questions with step by step
please answer it as soon as possible

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Grade:12

1 Answers

Arun
25750 Points
5 years ago
Dear student
 
Please ask only one question in one thread.
 
1)
 
cos-1 ( – 1/2) = 2 pi/3
 
Hope it helps
 
Regards

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