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February 13, 2017 3. sec2x - 1 sec2x = sin2x Obj: To prove trigonometric identites. February 13, 2017 4. sec x + 1 tan x = sin x 1 - cos x Obj: To prove trigonometric identites. February 13, 2017 5. tan x + cot x = sec x csc x Obj: To prove trigonometric identites. February 13, 2017 6. tan2x - sin2x = tan2x sin2 x Obj: To prove trigonometric identites. February 13, 2017 7. cos2x - sin2 x = 1 - 2 sin2 x Obj: To prove trigonometric identites. February 13, 2017 Obj: To prove trigonometric identites. 8. tan x + cot y tan x cot y = tan y + cot x February 13, 2017 Obj: To prove trigonometric identites. 9. 1 + sin x 1 - sin x = 1 + sin x cos x February 13, 2017 Obj: To prove trigonometric identites. 10. 1 - 3cos x - 4 cos2 x 2 sin x = 1 - 4cos x 1 - cos x February 13, 2017 Obj: To prove trigonometric identites. HF: (HR): DAY 1: (5.2) Pg.418: 11-33odd DAY 2: (5.2) Pg.418: 35-41odd, 45, 47