Question

which expression is equivalent to sin(42degrees)cos(48degrees)+cos(42degrees)sin (48degrees)?

Answer 1

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Answer 2

everyone doing these same questions tonight? must be an epidemic
this is the "addition angle" formula for sine
\[sin(a+b)=sin(a)cos(b)+cos(a)sin(b)\]
here \[a=42,b=48,a+b=90\]
\[sin(90)=1\]

Answer 3

i dont remeber this there from like my freshman year.

Answer 4

thank you though : )