Question

tan 10° tan 50° tan 70º = tan 30°​

Answer 1

Answer:

Step-by-step explanation:

tan10 tan(60-10)tan(60+10)=tan30

tan(a+b)=tan(a)+tan(b)/1-tanatanb

tan(a-b)=tan(a)-tan(b)/1+tan(a)tan(b)

tan10[tan60-tan10]/1+tantan60tan10][tan60+tan10]/1-tan60tan10]

tan10[$\sqrt{3}$-tan10/1+$\sqrt{3$tan10][$\sqrt{3}$+tan10/1-$\sqrt{3}$tan10]

tan3x formula you want to know i am giving image