| A. cos ( α + β ) = cos α.cos β + sin α.sin β |
| B. cos ( α + β ) = cos α.cos β − sin α.sin β |
| C. cos ( α + β ) = cos α.sin β + sin α.cos β |
| D. cos ( α + β ) = cos α.sin β − sin α.cos β |
| E. cos ( α + β ) = cos α.sin β − cos α.sin β |
[ 5-3983 - op net sinds 26.7.2020-(E)-24.10.2023 ]
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Which formula is correct ? |
A. |
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| B. | |
| C. | |
| D. | |
| E. |
