50 points solve on copy
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Answered by
1
Cos-1*(2x-1)
1/cos * (2x-1)
2x-1/cos
Hope it helps
Answered by
0
x= cos^2A , or cosA=+/-x
=cos^-1(2cos^2A-1)
=cos^-1.cos2A
=2A
=2.cos^-1(+/-x)^1/2
..
=cos^-1(2cos^2A-1)
=cos^-1.cos2A
=2A
=2.cos^-1(+/-x)^1/2
..
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