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诱导公式sinπ/2+cos-π+tan5π/4=求值
题目详情
诱导公式
sin π/2 +cos -π +tan 5π/4 = 求值
sin π/2 +cos -π +tan 5π/4 = 求值
▼优质解答
答案和解析
sin π/2 +cos -π +tan 5π/4
=1+cosπ +tan(π+π/4)
=1+(-1)+tanπ/4
=tanπ/4
=1
=1+cosπ +tan(π+π/4)
=1+(-1)+tanπ/4
=tanπ/4
=1
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