Объяснение:
3sin0°+4cos180° = -4
5sin90°- 7ctg90° = 5-7cos90°/sin90° = 5
cos²110°+sin²110 = 1
cos²40°+sin²140° = cos²40°+sin²40° = 1
Объяснение:
3sin0°+4cos180° = -4
5sin90°- 7ctg90° = 5-7cos90°/sin90° = 5
cos²110°+sin²110 = 1
cos²40°+sin²140° = cos²40°+sin²40° = 1