3 years ago

Sin(11∘)cos(19∘)+cos(11∘)sin(19∘)

1 answer:

3 0

Recall that:

sin(A + B) = sinAcosB + cosAsinB

Therefore:

sin11°cos19° + cos11°sin19° = sin(11° + 19°)

= sin30° = 0.5

I hope this explains it.

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