Math, asked by tiyasa3, 1 year ago

prove that: cot9°cot27°cot45°cot63°cot81°=1

Answers

Answered by 15121115anil
20
hello friend
here is your answer
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=> tan(90°–81°) tan(90°–63°) cot45° cot63° cot81°

=> tan81° cot 81° tan63°cot63°cot45°

{ tan∅cot∅ = 1}

=> 1×1×1

= 1

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hope it will help you .....✌✌✌
Answered by NishantMishra3
13
heyy mate!!♥

your solution:

=cot9°.cot27°.cot45°.cot63°.cot81°

=cot(90°-27°).cot(90°-81°).cot81°.cot63°.cot45°

=tan27°.cot27°.tan81°.cot81.cot45°

=1

▶PLEASE CHECK IT

HOPE IT HELPS♥❤
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