Tính giá trị của biểu thức lượng giác,biết a) sin(a-b) , cos(a+b) , tan(a+b) khi sin a = 8/17 , tan b = 5/12 b) cos(π/3-a) khi sin a = -12/13 , 3π/2 < a < 2π c) tan(a+π/3) khi sin a = 3/5 , π/2 < a < π

Ask your question to the AI advisor

Ai-bot is an expert in any field and is the perfect companion for reliable and useful answers and advice on a variety of topics, including science, history, technology, art, sports, health, culture and more.