Evaluate : 2(tan 57°)\(cot 33°) - (cot 70°)\(tan 20°) - ((2)^(1\2))cos 45°

Question

KnowledgeBoat · Accepted Answer

Solving, By formula, tan(90° - θ) = cot θ and cot(90° - θ) = tan θ Hence, cos 45° = 0.

Mathematics