Question

Evaluate cot12°cot38°cot52°cot60°cot78°

Answer 1

Answer:

see the above pic

hope it helps you

Answer 2

Answer:

ANSWER IS 1/√3

Step-by-step explanation:

• cot12°cot38°cot52°cot60°cot78°
• cot(90-78)cot(90-52)cot52°cot60°cot78°

SO cot(90-¢) = tan¢ then,

• tan78°tan52°cot52°cot60°cot78°

AS we know tan¢=1/cot¢ then,

• 1/cot78° × 1/cot52° × cot52° × cot60°×cot78°

AFTER CANCELLING

• cot60°
• 1/√3

HOPE U LIKE IT CLICK THANKS PLS..