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Some Applications Of Trigonometry

Question

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If A, B, C are interior angles of a triangle ABC. Prove that $cos open parentheses fraction numerator straight A plus straight C over denominator 2 end fraction close parentheses space equals space sin straight B over 2.$

Solution

Solution not provided.

Some More Questions From Some Applications of Trigonometry Chapter

Choose the correct option and justify your choice:
sin 2A = 2 sin A is true when A =
(A) 0° (B) 30° (C) 45° (D) 60°

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