- 問題詳情:設f(α)=sinnα+cosnα,n∈{n|n=2k,k∈N*}(1)分別求f(α)在n=2,4,6時的值域;(2)根據(1)中的結論,對n=2k(k∈N*)時,f(α)的取值範圍作出一個猜想(只需寫出猜想,不必*).【回答】:(1)當n=2時,f(α)=sin2α+cos2α=1,所以f(α)的值域為{1};當n=4時,f(α)=sin4α+cos4...
- 22010
- HowmanyNorthernIrelandProtestantsvoteforSinnFein?SinnFeinhasevidentlycalculatedthatthisriskisworthtaking.DuringthevisithepromisedtopushSinnFeintomakeconcretepositivedecisions.ProvokedaspatwithSinnFeindaysbeforethesoldiersinAntrimwerekilled.Thehopeist...
- 7900