Factorize
1. 1-2sinxcosx-tan^2x
簡化
2.x^8-256 / x^6+4x^4+16x^2+64
Factorize and 簡化
2007-08-27 7:23 pm
回答 (1)
2007-08-27 7:54 pm
✔ 最佳答案
1) 1-2sinxcosx-tan^2x= sin^2x-2sinxcosx+cos^2x - tan^2x
= (sinx-cosx)^2 - tan^2x
=(sinx-cosx+tanx)(sinx+cosx+tanx)
2) x^8-256 / x^6+4x^4+16x^2+64
= (x^4-16)(x^4+16)/ (x^2+4)(x^4+16)
= (x^2+4)(x^2-4)/(x^2+4)
=x^2-4
=(x-2)(x+2)
收錄日期: 2021-04-23 21:24:14
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070827000051KK01350