Question

sin30+$sin^{2}$45-cos60-cos180=?

Answer 1

sin 30°= 1/2

sin 45°=√2/2=> sin^2 45° =(√2/2)^2 =>

sin^2 45°= 2/4=1/2

cos 60°=1/2

cos 180°=-1

•dupa le aduni ca in imagine: