Question

giupsw mình câu 2 bài 1 đc ko ạ

Answer 1

\(2,A=\tan^225^0\cdot\sin^265^0-5+\left(1+\sin25^0\right)\left(1-\sin25^0\right)\\ A=\dfrac{\sin^225^0}{\cos^225^0}\cdot\cos^225^0-5+1-\sin^225^0\\ A=\sin^225^0-5+1-\sin^225^0=-4\)