Evaluate:
(sin 10 * cos 80) + (cos 10 * sin 80)
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we know that
sin(a+b)=sina*cosb+cosa*sinb
form that it would be
sin(10+80)
=sin90
=1
sin(a+b)=sina*cosb+cosa*sinb
form that it would be
sin(10+80)
=sin90
=1
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