Mathematics
(i) Find angle A, if 2 sin2 A - sin A = 0 and 0 ∠A 90° (ii) Find angle B, if 2 cos 2B - 1 = 0 and ∠B is an acute angle. (iii) State the value of cot (A + B).
Related Questions
As shown in the adjoining figure, a wire of uniform thickness is rolled on a cylinder to cover it completely, without any overlapping. If the diameter of the wire is 0.25 cm, find :
(i) the number of turns made by the wire to cover the cylinder completely.
(ii) length of wire used.
In the given figure, ∠BCD = 75°, O is center of the circle and chord AB = chord AD. Find :
(i) ∠BOD
(ii) ∠ODB
(iii) ∠BAO
