introduction to trigonometry ,domain range and graph of trigonometric functions ,basic trigonometric identities and trigonometric ratios of standard angles and trigonometric ratios of angles in different quadrant(trigonometry ratios of allied angles),trigonometric functions of sum and difference of two angles
trigonometric functions of sum and difference of two angles,multiple angles and half angles,factorization of the sum or difference of two sines or cosines,important trigonometric ratios,conditional identities, some special identites (sin2a in terms of tan a , cos2a in term of tan a ) and its questions