Mathematics
Without using trigonometric tables, prove that:
sec2 22° - cot2 68° = 1
Related Questions
Without using trigonometric tables, prove that:
cos2 25° + cos2 65° = 1
Without using trigonometric tables, prove that:
cosec2 67° - tan2 23° = 1
Without using trigonometric tables, prove that:
sin 63° cos 27° + cos 63° sin 27° = 1
Without using trigonometric tables, prove that:
sec 31° sin 59° + cos 31° cosec 59° = 2.