4 /cot square30 Plus 1/sin square 60 -cos square45
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=4/cot²30+1/sin²60-cos²45
=4/(√3/2)²+1/(√3/2)²-(1/√2)²
=4/3/4+1/3/4-1/2
=16/3+4/3-1/2
=20/3-1/2
=37/3
=4/(√3/2)²+1/(√3/2)²-(1/√2)²
=4/3/4+1/3/4-1/2
=16/3+4/3-1/2
=20/3-1/2
=37/3
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