根号2/4sin(45°-x)+根号6/4cos(45°-x)利用和(差)角公式化简 只化简,
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/24 12:02:40
![根号2/4sin(45°-x)+根号6/4cos(45°-x)利用和(差)角公式化简 只化简,](/uploads/image/z/5411495-47-5.jpg?t=%E6%A0%B9%E5%8F%B72%2F4sin%2845%C2%B0-x%EF%BC%89%2B%E6%A0%B9%E5%8F%B76%2F4cos%2845%C2%B0-x%29%E5%88%A9%E7%94%A8%E5%92%8C%EF%BC%88%E5%B7%AE%EF%BC%89%E8%A7%92%E5%85%AC%E5%BC%8F%E5%8C%96%E7%AE%80+%E5%8F%AA%E5%8C%96%E7%AE%80%2C)
根号2/4sin(45°-x)+根号6/4cos(45°-x)利用和(差)角公式化简 只化简,
根号2/4sin(45°-x)+根号6/4cos(45°-x)
利用和(差)角公式化简 只化简,
根号2/4sin(45°-x)+根号6/4cos(45°-x)利用和(差)角公式化简 只化简,
根号2/4 sin(45°-x)+根号6/4 cos(45°-x)
=根号2/2[1/2 cos(45°-x)+(根号3)/2 sin(45°-x)]/2sin(90°-2x)
=根号2/2[sin30°cos(45°-x)+cos30°sin(45°-x)]
=根号2/2sin(75°-x)