prove that: cot9°cot27°cot45°cot63°cot81°=1
Answers
Answered by
20
hello friend
here is your answer
—————————
=> tan(90°–81°) tan(90°–63°) cot45° cot63° cot81°
=> tan81° cot 81° tan63°cot63°cot45°
{ tan∅cot∅ = 1}
=> 1×1×1
= 1
——————————
hope it will help you .....✌✌✌
here is your answer
—————————
=> tan(90°–81°) tan(90°–63°) cot45° cot63° cot81°
=> tan81° cot 81° tan63°cot63°cot45°
{ tan∅cot∅ = 1}
=> 1×1×1
= 1
——————————
hope it will help you .....✌✌✌
Answered by
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♥❤
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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