Math, asked by Madhan3073, 1 year ago

Cos(a) + cos(a+h) + cos(a+2h) +........+ cos(a+(n-1)h) = ?

Answers

Answered by somi45

3

cos{a+(n-1)÷2× h} × sin(nh÷2)÷sin(h÷2)

Answered by abhisheksoni651

3

Answer:

Step-by-step explanation:

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