tan20+tan72+tan88= tan20.tan72.tan88 Share with your friends Share 1 Gaurav Bansal answered this what are the examples of consumer cooperative stores in india -1 View Full Answer Hello answered this By using formula tan(A+B) = (tanA + tanB)/(1-tanAtanB) And substituting tan180 as tan(160+20) and further substituting 160 as 88+72 answer is obtained. 0
