if angle A=60degree, 3 sin cube A-4 sin A=
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Solution:
<A = 60°
Value of 3sin³A - 4sinA
= 3sin³ 60° - 4sin60°
= 3×(√3/2)³ - 4×(√3/2)
= 3×(3√3)/8 - 4√3
= 9√3/8 - 4√3
= (9√3 - 32√3)/8
= (-23√3)/8
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