Question

${cot60}^{2} + {sin45}^{2} + {sin30}^{2} + {cos90}^{2} =$

Answer 1

13/12 is the answer
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Answer 2

cot60^2+sin45^2+sin30^2+cos90^2
=(1/√3)^2+(1/√2)^2+(√3/2)^2+(0)^2
=1/3+1/2+3/4
=4+6+9/12
=19/12