English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories
1 ⤊

cos5x/2+cos3x/2?

2007-10-26 09:41:51 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

2 answers

cos A + cos B
= 2 cos [ (A + B) / 2 ] cos [ (A - B) / 2 ]

cos (5x/2) + cos (3x/2)
= 2 cos 2x cos (x/2)

2007-10-30 08:44:19 · answer #1 · answered by Como 7 · 1⤊ 0⤋

cos(5x/2)+cos(3x/2) = 2·cos(2x) · cos(x/2)

Saludos.

2007-10-26 12:28:39 · answer #2 · answered by lou h 7 · 0⤊ 0⤋

fedest.com, questions and answers