sqrt2 * sin v = 1
0°≤v≤180
what is cos (v+45°)?
Math help. Please solve :)?
2020-09-29 7:34 pm
回答 (2)
2020-09-29 7:46 pm
√2 * sin v = 1
sin v = 1/√2
v = 45° or v = (180 - 45)° for 0° ≤ v ≤ 180°
v = 45° or v = 135°
cos(v + 45°) = cos(45° + 45°) or cos(v + 45°) = cos(135° + 45°)
cos(v + 45°) = cos 90° or cos(v + 45°) = cos 180°
cos(v + 45°) = 0 or cos(v + 45°) = -1
sin v = 1/√2
v = 45° or v = (180 - 45)° for 0° ≤ v ≤ 180°
v = 45° or v = 135°
cos(v + 45°) = cos(45° + 45°) or cos(v + 45°) = cos(135° + 45°)
cos(v + 45°) = cos 90° or cos(v + 45°) = cos 180°
cos(v + 45°) = 0 or cos(v + 45°) = -1
收錄日期: 2021-04-24 08:07:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20200929113425AAqpmCF