Cos^2A+cosA=1 prove that 2sinA-cosA=1
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cos^2 A = 1 - cosA
cos ^2 = 1 - sin^2A
1 - cos A = 1 - sin^2A
cosA = sin^2 A
sin^2A - cos A = 1
cos ^2 = 1 - sin^2A
1 - cos A = 1 - sin^2A
cosA = sin^2 A
sin^2A - cos A = 1
ksvhooda:
It does not prove what is asked
wait I will edit and you will understand
2 min
No actually i understand but just look what is to prove in the question
2 sinA
Yes
ok
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