45 cos tan cos2 sin sec evaluate question cot maths cbse boards 2nd standard sample class paper slide109 Ex 8.2, 1 class 10 Diamond ruler 60 degree creative grids slip non table diamonds use
Ex 8.2, 1 Class 10 - Evaluate (i) sin 60° cos 30° + sin 30° cos 60°
Evaluate: (cos2 (45° + θ) + cos2 (45°