1) sin β 2) cos β 3) cot β 4) cosec β 5) 2 cos β Answer: (3) cot β Solution: Given that α, β, γ are in AP, then 2β = α + γ. Or β = (α... View Article
1) √2 2) 1/2 3) 4 4) -1 Answer: (2) 1/2 Solution: Given, sin A + cos A = √2 Dividing by √2 on both sides, (sin A + cos A)/√2 = √2/√2... View Article
1) 0 2) 1 3) 1/√2 4) -1 Answer: (1) 0 Solution: cos 1° cos 2° cos 3° ... cos 179° cos 1° cos 2° cos 3° ... cos 179° = cos 1° cos 2° cos... View Article
1) x + y ≠0 2) x = y, x ≠0 3) x = y 4) x ≠0, y ≠0 Answer: (2) x = y, x ≠0 Solution: Given, sec2θ = 4xy/(x + y)2 We know that,... View Article