if sin a = 1/2 then find 3sina -4 sim 3 a
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Answered by
9
sin a = 1/2
3sin a -4 sin 3 a
3 x 1/2- 4 (1/2) cube
3/2-4 x 1/8
3/2 - 1/2
2/2
=1
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rosangiri28pfbc5r:
can be written in this app
maybe the person dose not know
Anyway both answers are in their own way
Anyway both answers are correct in their own way
hmm
you are right
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Answered by
3
easy one
Since sin a = 1/2
a = sin inverse (1/2)
a = 30°
so , 3 sina -4 sin 3a = 3×1/2 -4 sin 3×30
= 3/2 - 4 sin 90
= 3/2-4
= -5/2 is right answer
Since sin a = 1/2
a = sin inverse (1/2)
a = 30°
so , 3 sina -4 sin 3a = 3×1/2 -4 sin 3×30
= 3/2 - 4 sin 90
= 3/2-4
= -5/2 is right answer
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