solve the 6th one.
give an appropriate answer.
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cosec ( -33π/4 ) ... as { cosec ( -A ) = - cosec A }
=> - cosec ( 33π/4 )
=> - cosec ( 8π + π/4 )...... { cosec ( nπ+ A ) = cosec A }
=> - cosec ( π/4 )
=> - √2
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