Find the value of sin2 30-tan2 60+cosec2 60+6sec2 45/cosec90+cos60-tan2 45
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(1÷2)2-(1√3)2+(2√3)2+6×(√2)2÷1+1÷2-1
=1÷4-1÷3+4÷3+12+1÷2-2
=1÷4+1-1+12+1÷2
=3÷4+12
=3+48÷4
=51÷4
The value of it is 51÷4
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