化简:1/(1+sin²α)+1/(1+cos²α)+1/(1+sec²α)+1/(csc²α)如题,我实在化不出来

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/30 02:37:59
化简:1/(1+sin²α)+1/(1+cos²α)+1/(1+sec²α)+1/(csc²α)如题,我实在化不出来
x){3{fkjg)ۨ I/F)NMFI.F.kzhγO{:g';zz6wMR>N;{o=`6 5 bH:cFc7Uv4kme &\Mj

化简:1/(1+sin²α)+1/(1+cos²α)+1/(1+sec²α)+1/(csc²α)如题,我实在化不出来
化简:1/(1+sin²α)+1/(1+cos²α)+1/(1+sec²α)+1/(csc²α)
如题,我实在化不出来

化简:1/(1+sin²α)+1/(1+cos²α)+1/(1+sec²α)+1/(csc²α)如题,我实在化不出来
原式=
1/(1+sin²a)+1/(1+cos²a)+1/[1+(1/cos²a)]+1/[1+(1/sin²a)]
=[1/(1+sin²a)+1/(1+1/sin²a)]+[1/(1+cos²a)+1/(1+1/cos²a)]
=[1/(1+sin²a)+sin²a/(1+sin²a)]+[1/(1+cos²a)+cos²a/(1+cos²a)]
=1+1
=2