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How do you write the expression as an angle sin42cos17-cos42sin17
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How do you write the expression as an angle sin42cos17-cos42sin17

User Artalus
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sin(a+b)=sin(a)cos(b)+cos(a)sin(b).
Let a=42 and b=17 so sin(42+17)=sin59.
User Gualberto
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