Solve the equation : 2*sin^2 x + cos x - 1 = 0

Expert Answers

An illustration of the letter 'A' in a speech bubbles

The equation `2*sin^2 x + cos x - 1 = 0` has to be solved for x.

This trigonometric equation has both sin x as well as cos x. It is possible to write `sin^2x = 1 - cos^2x` . This eliminates sin x and would allow the equation to be written as a quadratic in terms of cos x.

(The entire section contains 178 words.)

Unlock This Answer Now

Start your 48-hour free trial to unlock this answer and thousands more. Enjoy eNotes ad-free and cancel anytime.

Start your 48-Hour Free Trial
Approved by eNotes Editorial Team

Posted on