y=sin(A+B/2+B/2) - sin(A+B/2-B/2)
y=sin(A+B/2)cos(B/2)+cos(A+B/2)sin(B/2)-sin(A+B/2)cos(B/2)+cos(A+B/2)sin(B/2)
即y=2sin(B/2)cos(A+B/2)
公式就是sin(a+b)=sin(a)cos(b)+cos(a) sin(b)
Y=sin(A+B)-sinA =2sin(B/2)*cos(A+B/2) 请问为什么啊?有关一个数学公式的转换问题!谢谢各位~~
Y=sin(A+B)-sinA =2sin(B/2)*cos(A+B/2) 请问为什么啊?有关一个数学公式的转换问题!谢谢各位~~
Y=sin(A+B)-sinA
=2sin(B/2)*cos(A+B/2)
请问为什么啊?
Y=sin(A+B)-sinA
=2sin(B/2)*cos(A+B/2)
请问为什么啊?
数学人气:117 ℃时间:2020-04-07 07:30:34
优质解答
我来回答
类似推荐
猜你喜欢
- 1关于一道中学的简单数学题
- 2含义与涵义的区别
- 3初二数学题(就一道填空题)
- 4提手旁的跟手有关的字,最少四个
- 5if he or she is looking for other people in the f____.You can ask the caller to wait,"H____ on,please
- 6旺家村今年的苹果比去年增长二成,今年产量是去年的百分之几?求算式
- 7典中点六年级下册答案
- 8把-1,+2,-3,+4-5.+6,-7,+8,-9填入下边的方框内,使得每行每列每一条对角线的三个数都满足
- 9It is very kind of you to help me.
- 10一辆汽车以36km/h的速度向着山崖匀速行驶,在距意悬崖绝壁875m处按了一声喇叭,声音以340m/s的速度向前传播,遇到崖壁反射回来.问:驾驶员要经过多长时间能听到回声?请写出详细过程··3Q.