Please solve the 2nd one.
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this is the correct answer
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Kunalkkr:
another method
plz
no from my own perception this is the one only answer
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cosec²Ф( cosec²Ф -1 ) = cosec²Ф ( cot²Ф ) = [ cot ²Ф + 1 ](cot²Ф)
=>
- cosec²Ф = 
+ cot²Ф
.... There you go......
=>
.... There you go......
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