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

Show that (1 + 2cos ) is a factor of f( ) = 8cos 3 - 4cos – 1

  1. Show that (1 + 2cos) is a factor of f() = 8cos3 - 4cos – 1

Grade:

1 Answers

Shobhit Varshney IIT Roorkee
askIITians Faculty 33 Points
7 years ago
Dear student,

I will denote theta by x (for simpliciy)

so , we can write f(x) as
f(x) = (8cos3x + 1) – 4 cosx – 2
= (2cosx + 1) (4cos2x + 1 – 2cosx – 2)

Thanks.

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