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

sin^2 6°-sin^2 12°+sin^2 18°-sin^2 24°......15 solve it

sin^2 6°-sin^2 12°+sin^2 18°-sin^2 24°......15 solve it

Question Image
Grade:12th pass

1 Answers

Akhand
23 Points
4 years ago
(1-cos2x6)/2 +(1-cos24)/2+ …......................+(1-cos180)/2
15/2 -1/2(cos12 +cos24...........+cos180) use cos(a)+cos (a+b) +cos(a+2b)+....(cos(a+nb)=
{sin(nb/2)cos[a+(n-1)b/2]}/sinb/2
sin90xcos96/sin6=-1

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