Mathematics
Without using trigonometric tables, prove that:
sin2 28° - cos2 62° = 0
Related Questions
Express the following in terms of trigonometric ratios of angles between 0° to 45° :
tan 81° + cos 72°
Express the following in terms of trigonometric ratios of angles between 0° to 45° :
cot 49° + cosec 87°.
Without using trigonometric tables, prove that:
cos2 25° + cos2 65° = 1
Without using trigonometric tables, prove that:
cosec2 67° - tan2 23° = 1