Find value of  cot8° . cot17° . cot26° . cot35° . cot45° . cot55° . cot64°. cot73° . cot82° .

2 -1 1 0

1

cot8° . cot17° . cot26° . cot35° . cot45° . cot55° . cot64°. cot73° . cot82° Here, ⇒ (cot A . cot B = 1, when A + B = 90°) So, ⇒ (cot8° . cot82°) . (cot17° . cot73°) . (cot26° . cot64°) . (cot35° . cot55°) . cot45° = 1 × 1 × 1 × 1 × 1 = 1