Cos (x + 45°) – Sin (45 + x) =​ Jawab:85 Penjelasan dengan langkah-langkah: Naja-whwj-ajjs×jwjw=85 Jawaban: cos(x)cos(45°)-sin(x)sin(45°)-sin(45-x) cos(x)×√2/2-sin(x)sin(45°)-sin(45-x) cos(x)×√2/2-sin(x)×√2/2-sin(45-x) √2×cos(x)/2-√2×sin(x)/2-sin(45-x) […]