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Mathematics, 20.10.2020 03:01 cs101200

Which expression is equivalent to cos(40°)cos(10°) + sin(40°)sin(10°)? sin(40° – 10°)
cos(40° + 10°)
sin(40° + 10°)
cos(40° – 10°)

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Which expression is equivalent to cos(40°)cos(10°) + sin(40°)sin(10°)? sin(40° – 10°)
cos(40°...

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