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if a+b+c = 2 theta, then cos theta + cos (theta – a) + cos (theta – b) + cos (theta – c) is

if a+b+c = 2 theta, then cos theta + cos (theta – a) + cos (theta – b) + cos (theta – c) is

Grade:11

1 Answers

Saurabh Koranglekar
askIITians Faculty 10336 Points
2 years ago
Dear student

Let a,b,c be 60

a+b+c= 2*90 =180

So required solution is 3*(cos 30)

Regards

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