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Grade: 11

                        

Let e1 and e2 be unit vectors in the OXY-plane which make angles α and β withthe x-axis. Show that e1 = i cos α + jsin α, e2 = i cos β + jsin β and prove thatcos(α − β) = cos α cos β + sin α sin β

3 years ago

Answers : (1)

Deepak Kumar Shringi
askIITians Faculty
4403 Points
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2 years ago
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