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Mathematics, 19.10.2020 23:01 sloane50

Which expression is equivalent to cos(103°)cos(54°) – sin(103°)sin(54°)? sin(49°)
cos(49°)
sin(157°)
cos(157°)

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Which expression is equivalent to cos(103°)cos(54°) – sin(103°)sin(54°)? sin(49°)
cos(49°) <...
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