CBSE Class 12-science Answered
1.?Sin8x-cos8x/1-2sin2xcos2x dx is equal to
2.?cos4x+1/cotx-tanx dx=a cos 4x+b,find a
Asked by abhi patel | 16 May, 2012, 09:13: PM
Expert Answer
We would request you to please ask one question at a time. The solution to your first question is as follows:
sin8x-cos8x=(sin4x+cos4x)(sin2x-cos2x)
=(1-2sin2xcos2x)(sin2x-cos2x)
=(1-2sin2xcos2x)(sin2x-cos2x)
Therefore,
(sin8x-cos8x) / (1-2sin2xcos2x) = sin2x-cos2x
Now, you can easily integrate this.
Answered by | 17 May, 2012, 09:50: AM
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