Решите тест, пожалуйста:
1) arcctg 1 :
а) π/2; б) π/4; в) π; г) π/3
2) різниця arccos 1 - arccos 0:
а) π/2; б) π; в) 3π/2; г) 0
3) sin α > √2/2:
а) π/6; б) 0; в) π/3; г) 5π/6
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