Velocity of sound in air is
sin 60∘cos 45∘tan 45∘cot 60∘sec 30∘cosec 90∘
Evaluate: sin30∘+tan45∘−cosec60∘cot45∘+cos60∘−sec30∘.
Question 1 (iii) Evaluate the following: (iii) cos45∘(sec30∘+cosec30∘)
Evaluate: cos45∘sec30∘+csc30∘