Question

cot12 • cot38 • cot52 • cot60 • cot78,Evaluate it.

Answer 1

Hey friend,
Here is your answer

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Answer 2

Answer:

1/√3

Step-by-step explanation:

Cot 12°.Cot38°.Cot52°.Cot78°

=Cot12°•Cot38°•Cot(90°-38°)• 1/√3 • Cot(90°-12°)

=Cot12°•Cot38°•Tan38°•1/√3 •Tan12°

=(Tan12°•Tan12°) (Tan38°•Tan38°) •1/√3

= 1•1• 1/√3

=1/√3

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