（Ⅰ）当x∈R时，求f（x）的单调增区间；

（Ⅱ）当 $x\in 0，\frac{\pi }{2}$ 时，求f（x）的值域．

读一读，判断正(T)误(F)。

   It's sunny today. Peter and his friendshave a picnic in the park. They're very happy. Peter: What do you have, Joe?

Joe: I have someapples. They are so sweet. What about you, Peter?

Peter: I havesome cakes, some biscuits and some fruit juice.

Kitty: Wow! Ihave some sweets and some bread. Would you like some bread, Alice?

Alice: Sure, Ilike bread very much. And I have a kite. Then we can fly a kite.

Peter: OK,let's have our picnic now.

Kitty: Goodidea!

下图中雄伟壮观的布达拉宫位于  （              ）