Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

cos 2pi/7 + cos 4pi/7 + cos 6pi/7 +..............is a).is eqal to zero , b).is a negative no, c).lies between 0 and 3 , d). lies between 3 and 6

cos 2pi/7 + cos 4pi/7 + cos 6pi/7 +..............is
a).is eqal to zero , b).is a negative no, c).lies between 0 and 3 , d). lies between 3 and 6

Grade:11

1 Answers

Soumendu Majumdar
159 Points
3 years ago
According to me, it should be a negative number because if you look into the interval of 2\Pi more values of cos are negative than values which are positive.
Hope it helps!

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free