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What is cos(x°)= cos(57°)cos(94°)-sin(57°)sin(94°)
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What is cos(x°)= cos(57°)cos(94°)-sin(57°)sin(94°)

User Zpon
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Note that the given cos(57°)cos(94°)-sin(57°)sin(94°) resembles the formula

cos a cos b - sin a sin b, which is cos (a+b).


Therefore, cos(57°)cos(94°)-sin(57°)sin(94° = cos (57+94) = cos 151.

User Gco
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