Jawabanmu

2014-03-04T16:42:11+07:00
Kalo pangkat 6 mnrutku baru benar.., kalo kali gk
= (Sin^2 A)^3+ (Cos^2 A)^3
 
=pakai  A^3+B^3=(A+B)(A2+B2-AB)
=> jadi
(sin^2 A+Cos^2 A)(sin^4 A + Cos^4 A - Sin^2 A Cos^2 A)

=>(1)(Sin^4 A + Cos^4 A - sin^2 A cos^2 A + 2Sin^2 A Cos^2 A  -  2Sin^2 A cos^2 A)

=> (Sin^2 A+Cos^2 A)2-3sin^2 Acos^2 A

=>(1)2-3sin^2Acos^2A

 
=>1-3sin^2Acos^2A