SSC CPO SI and ASI Model Paper 2

(4) tan10° × tan20° × tan30° ×tan40° × tan50° × tan60° × tan70° × tan 80°
= tan10°× tan20° × tan30° ×tan40°× tan (90° – 40°) × tan (90°– 30°) × tan (90° – 20°) × tan (90°– 10°)
= tan 10° × tan 20° × tan 30° × tan40° × cot 40° × cot 30° × cot 20° ×cot 10° = 1