1.

2. Attempt the following:[2 marks each(1) Find the value of 32 sin 54°cot 18ocos 36°Ans.

Answer»

tan 72° sin 54°3 × ----------- - 2 × ---------- cot 18° cos 36°

tan (90-18)° sin (90 - 36)3 × ------------------ - 2 × --------------- cot 18° cos 36°

cot 18 cos 36°3 × ----------- - 2 × ---------- cot 18° cos 36°

3 × 1 - 2 × 1

3 - 2

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