化简sin(a+75`)+cos(a+45`)-根号3cos(a+15`)
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/09 03:32:42
化简sin(a+75`)+cos(a+45`)-根号3cos(a+15`)
化简sin(a+75`)+cos(a+45`)-根号3cos(a+15`)
化简sin(a+75`)+cos(a+45`)-根号3cos(a+15`)
设a+15=b
sin(b+60)+cos(b+30)-√3cosb
=sinb*1/2+cosb*√3/2+cosb*√3/2-sinb*1/2-√3cosb
=0
cos^4A-sin^4a 化简
化简sin a+cos a
化简1-sin^4a-cos^4a/1-sin^6a-cos^6a
1-sin^6a-cos^6a分之1-sin^4a-cos^4a 化简
化简:sin^4a+cos^2a-sin^2a-cos^4a
化简 sin^4a-cos^4b
化简 1-sin^4a-cos^4a/cos^2a-cos^4a
化简(1-sin^6 a-cos^6 a)/(cos^2 a-cos^4 a)==
化简sin(A+π/4)sin(A-π/4)/sin^4A-cos^4A
化简tan a(cos a-sin a)+sin a(sin a+tan a)/1+cos a
化简:(sin^6a+cos^6a-1) / (sin^4ª+cos^4a-1)
(1-sin^4a-cos^4)/(sin^2a-sin^4a) 化简
化简(sin a^2/cos a +cos a)*cot a
化简1-cos^4a-sin^4a/1-cos^6-sin^6acos^6应为cos^6a
化简cos^2 a(2cos^2 a+3)-sin^2 a(2cos^2 a+3)-4sin^2 a cos^2 a +3
sin^4+sin^2cos^2+cos^2a=
4sin(a/4)cos(a/4)cos(a/2)cosacos2a化简,a是某角.
化简:sin(-a)cos(2π+a)sin(-a-π)