ingat rumus :
sin (a+b) = sin a cos b + cos a sin b
maka :
Sin 50°cos 10°+cos 50°sin 10° = Sin (50 + 10)
= sin 60
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ingat rumus :
sin (a+b) = sin a cos b + cos a sin b
maka :
Sin 50°cos 10°+cos 50°sin 10° = Sin (50 + 10)
= sin 60
= 1/2√3