Question

計(jì)算：．

Answer 1

【答案】分析：本題涉及乘方、負(fù)整數(shù)指數(shù)冪、特殊角的三角函數(shù)值、絕對(duì)值四個(gè)考點(diǎn)．針對(duì)每個(gè)考點(diǎn)分別進(jìn)行計(jì)算，然后根據(jù)實(shí)數(shù)的運(yùn)算法則求得計(jì)算結(jié)果．
解答：解：
=-4+3-2×+3
=-4+3-1+3
=1．
點(diǎn)評(píng)：本題考查實(shí)數(shù)的綜合運(yùn)算能力，是各地中考題中常見的計(jì)算題型．解決此類題目的關(guān)鍵是熟記特殊角的三角函數(shù)值，熟練掌握乘方、負(fù)整數(shù)指數(shù)冪、絕對(duì)值等考點(diǎn)的運(yùn)算．