白梅
冰雪林中着此身,不同桃李混芳尘。
忽然一夜清香发,散作乾坤万里春。
【注】王冕:元代诸暨人。幼年家贫,牧牛自学。后屡试进士不第,遂将举业文章付之一炬。晚年归隐九里山。
Jane has ______ from school for 2 years. When she ______ the happy time, she always misses her teachers and classmates.
已知sinα=45,α∈(π2,π).
(Ⅰ)求sin(α﹣π6)的值;
(Ⅱ)求tan2α的值.