CBSE Class 10 Answered
trignomentry
Asked by | 12 Feb, 2009, 09:12: PM
Expert Answer
put cotA and sinA in terms of sinA and cosA
on solving by taking lcm we get
cos3A - sin3A / sinA cosA (cosA - sinA)
=(cosA - sinA ) (cos2A + sin2A +sinA cosA) / sinA cosA (cosA - sinA)
=(cos2A + sin2A +sinA cosA) / sinA cosA
=cotA + tanA +1
Answered by | 16 Feb, 2009, 09:14: PM
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