sin6/29π+cos(-3/29π)+tan(-4/25π)等于多少
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解决时间 2021-01-25 10:16
- 提问者网友:温柔港
- 2021-01-24 13:12
sin6/29π+cos(-3/29π)+tan(-4/25π)等于多少
最佳答案
- 五星知识达人网友:詩光轨車
- 2021-01-24 13:26
纠正:sin(29π/6)+cos(-29π/3)+tan(-25π/4)
解:
sin(29π/6)+cos(-29π/3)+tan(-25π/4)
=sin(4π+5π/6)+cos(-10π+π/3)+tan(-6π-π/4)
=sin(5π/6)+cos(π/3)+tan(-π/4)
=sin(π/6)+cos(π/3)-tan(π/4)
=1/2+1/2-1
=0
解:
sin(29π/6)+cos(-29π/3)+tan(-25π/4)
=sin(4π+5π/6)+cos(-10π+π/3)+tan(-6π-π/4)
=sin(5π/6)+cos(π/3)+tan(-π/4)
=sin(π/6)+cos(π/3)-tan(π/4)
=1/2+1/2-1
=0
全部回答
- 1楼网友:雾月
- 2021-01-24 14:02
=sin(24/6+5/6)π+cos(-30/3+1/3)π+tan(-24/4-1/4)π
=sin(5/6π)+cos1/3π-tan1/4π
=1/2+1/2-1
=0
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