(Cos A + sin A)2=1+2cosA sinA?
Matematika
haikhalhafiz
Pertanyaan
(Cos A + sin A)2=1+2cosA sinA?
1 Jawaban
-
1. Jawaban WidyaSalsabila
cos A^{2} + sin A ^{2} = 1
(Cos A + Sin A )^{2} = (Cos A+Sin A)(Cos A+ Sin A)
= Cos A^{2} + Cos A.Sin A+Cos A.Sin A + Sin^{2}
= Cos A^{2} + Sin A^{2} + 2 Cos A. Sin A
= 1 + 2 Cos A.Sin A