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

find the value of cos^1+cos^2+cos^3+....+cos^90????.please answer me with a proper solution

 find the value of cos^1+cos^2+cos^3+....+cos^90????.please answer me with a proper solution

Grade:10

1 Answers

Anish Raj
29 Points
5 years ago
cos^2 1 + cos^89= 1 (cos 89= sin1 )
similarly upto cos^44 + cos^2 46 = 1 ( coss 44= sin 46)
i.e; (cos^2 1 + ...cos ^ 90)= 44 + cos^2 45 + cos ^2 90= 44.5

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