trigonometry
Asked by suchet_r
| 5th Dec, 2009,
10:18: PM
Expert Answer:
(sinA - 2sin3 A)/(2cos3 A - cosA) =
sinA(1-2sin2A)/[cosA(2cos2A -1)] =
sinA(sin2A + cos2A - 2sin2A)/[cosA(2cos2A -(sin2A + cos2A))] =
sinA(cos2A - sin2A)/[cosA(cos2A -sin2A)] =
tanA
Regards,
Team,
TopperLearning.
Answered by
| 6th Dec, 2009,
08:55: PM
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