How do you add this : cos(160°)cos(35°)+sin(160°)sin(40°)

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How do you add this : cos(160°)cos(35°)+sin(160°)sin(40°)

Guest Jan 11, 2016

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How do you add this : cos(160°)cos(35°)+sin(160°)sin(40°)

= -0.54990

Guest Jan 12, 2016

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