(sin a + cos a)^2 + (sin a - cos a)^2
Matematika
fatihamin37
Pertanyaan
(sin a + cos a)^2 + (sin a - cos a)^2
1 Jawaban
-
1. Jawaban AZHAAYL
= (sina+cosa)²+(sina-cosa)²
= sin²a +2sina.cosa+cos²a + sin²a -2sina.cosa + cos²a
= 2sin²a + 2cos²a
= 2(sin²a + cos²a)
= 2(1)
= 2