sin(5π/2+π/4)怎么变成sin(π/2+π/4)

Question

sin(5π/2+ π/4) 怎么变成 sin(π/2+π/4)

Answer 1

sin(5π/2+π/4)=sin(2π+π/2+π/4)=sin(π/2+π/4)
（诱导公式）
如果不懂,请Hi我,祝学习愉快!