sin60×cos30-cos60×sin30
simar14:
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wlcm dear
wlcum
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Answers
Answered by
3
sinAcosB-cosAsinB = sin(A-B)
so,
sin60×cos30-cos60×sin30
=sin(60-30)
=sin30
=1/2
so,
sin60×cos30-cos60×sin30
=sin(60-30)
=sin30
=1/2
Answered by
2
sin 60= √3/2
cos 30=√3/2
cos60=1/2
sin 30=1/2
so,
√3/2×√3/2-1/2×1/2
3/4-1/4
2/4
1/2
cos 30=√3/2
cos60=1/2
sin 30=1/2
so,
√3/2×√3/2-1/2×1/2
3/4-1/4
2/4
1/2
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