Question

Root of 3 into tan 12° into cot 45° into cot 60° into tan 78°

Answer 1

Step-by-step explanation:

√3×tan12°×cot45°×cot60°×tan78°

=√3×tan12°×tan(90°-12°)×1×1/√3{tan0°= tan(90°-0°)}

= √3×tan12°×cot12°×1×1/√3 ( tan theta ×cot theta)

= √3×1×1×1/√3 ( cot 45°=1 & cot 60°=1/√3)

= 1

Ans : 1