If cos4 θ - sin4 θ = 2/3, then the value of 1-2 sin2 θ is
If tan ∝ = n tan β and sin ∝ Q = m sin β, then cos2 ∝ is
If cos θ + sin θ = √2 cos θ, then cos θ - sin θ is
The value of 1/cosec θ - cot θ
1/sin θ is
The tops of two poles of height 24 m and 36 m are connected by a wire. If the wire makes an angle of 60° with the horizontal, then the length of the wire is
In a triangle, if three altitudes are equal, then the triangle is