sint+cost 怎么推出,根号2乘以sin(t+45°)
问题描述:
sint+cost 怎么推出,根号2乘以sin(t+45°)
答
sint+cost =√2*(√2)/2*SINT+*(√2)/2*COST)
=√2*(COS45°*SINT+*SIN45°*COST)
=√2*SIN(45°+T)
答
sint+cost
=根号2(2分之根号2 sint + 2分之根号2 cost)
=根号2 sin(t+45°)