Asked by jenny
find the general solutions to the equations:
1) sec x = -2
2) 2 sin^2 x = 1
3) cos^2 x - 2cos x + 1 = 0
1) sec x = -2
2) 2 sin^2 x = 1
3) cos^2 x - 2cos x + 1 = 0
Answers
Answered by
john
a). secx=-2
2pi/3 and 4pi/3
b). sinx=(2^(1/2)/2
its that value at pi/4, and 3pi/4
c). cosx=+ or - 1, so if they want multiple answers its 0, 2pi, and pi
2pi/3 and 4pi/3
b). sinx=(2^(1/2)/2
its that value at pi/4, and 3pi/4
c). cosx=+ or - 1, so if they want multiple answers its 0, 2pi, and pi
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