If cos θ + cos²θ = 1, find the value of
\(
\sqrt{\sin^{4}\theta + \cos^{2}\theta}
\)
In the given figure, if PA and PB are tangents to the circle with centre O such that ∠APB = 54°, then ∠OBA =
In the figure, XYZ is a secant and ZT is a tangent to the circle at T. If TZ = 12 cm and YZ = 8 cm, then find the length of XY.