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  4. In a triangle ABC , BC =3, AC =4 and AB =5. The value of sin A + sin 2 B + sin 3 C equals

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Q. In a triangle $ABC , BC =3, AC =4$ and $AB =5$. The value of $\sin A +\sin 2 B +\sin 3 C$ equals

Trigonometric Functions

Solution:

Correct answer is (b) $\frac{14}{25}$