[Senior High School Mathematics Compulsory 4-person Education Edition B: Images and Properties of Sine Function and Cosine Function] In the following questions,
Because 1
π-3 is obtained from π < 4.
by 3； 0
So 0
By π > 3 to π-2 >; 3-2 is π-2 >; 1 also came out.
π/2 is obtained from π < 4.
So there is 0.