What is the general solution, in degrees, to the equation 2cosxcos 2x – 2 sin x sin 2.x =-1? A. 40° +180'n; 80° +180°n; neI C. 40° +120°n; 80° +120'n; nel B. 40' +120°n; nel D. 220' +120'n; 330° +120°n; nel

What is the general solution, in degrees, to the equation 2cosxcos 2x – 2 sin x sin 2.x =-1? A. 40° +180'n; 80° +180°n; neI C. 40° +120°n; 80° +120'n; nel B. 40' +120°n; nel D. 220' +120'n; 330° +120°n; nel

Trigonometry (MindTap Course List)

8th Edition

ISBN:9781305652224

Author:Charles P. McKeague, Mark D. Turner

Publisher:Charles P. McKeague, Mark D. Turner

Chapter8: Complex Numbers And Polarcoordinates

Section8.3: Products And Quotients In Trigonometric Form

Problem 61PS

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What is the general solution, in degrees, to the equation 2cosxcos 2x – 2 sin x sin 2.x=-1?
A. 40° +180°n; 80° +180°n; nɛ1
C. 40° +120°n; 80° +120°n; nɛl
B. 40° +120°n; nɛl
D. 220° +120°n; 330° +120°n; n e l

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