1.

Please answer this:​

Answer»

If theta = 30°,

a) SIN 3×30° = 3 SIN30 - 4sin^3×30°

SIN90 = 3×1/2 - 4×(1/2)^3

1 = 3/2 - 4×1/8

1 = 3/2- 4/8

1 = 3/2 - 1/2

1 = 3-1/2

1 = 2/2

1 = 1


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