Arccos 1/2 + arcsin 1/2 -arctg 1

Question

Arccos 1/2 + arcsin 1/2 -arctg 1

Answer 1

=60°+30°-45°=90°-45°=45°
т к аrccos1/2=60°
аrcsin1/2=30°
аrctg1=45°
с пи : π/3+π/6-π/4=π/4