Asked by arun
Write the following expression as the sine, cosine, or tangent of an angle:
cos45°cos120° - sin45°sin120°
cos45°cos120° - sin45°sin120°
Answers
Answered by
Mgraph
cos(a)cos(b)-sin(a)sin(b)=cos(a+b)
Answer:cos(45+120)=cos165
Answer:cos(45+120)=cos165
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