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Tan9°. tan27°. tan45°. tan72°. tan81°= 1​ could u plz solve it with clear process

Tan9°. tan27°. tan45°. tan72°. tan81°= 1​ could u plz solve it with clear process
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4 votes
Tan9°. tan27°. tan45°. tan72°. tan81°= 1​

could u plz solve it with clear process

User Lawchit
by
8.4k points

1 Answer

3 votes

Correct question:-

Prove that tan9.tan17.tan45.tan73.tan81=1

LHS


\\ \sf\longmapsto tan9.tan17.tan45.tan73.tan81


\\ \sf\longmapsto tan9.tan81.tan17.tan73.tan45


\\ \sf\longmapsto tan(90-81).tan81.tan(90-73).tan73.1


\\ \sf\longmapsto cot81.tan81.cot73.tan73


\\ \sf\longmapsto 1.1


\\ \sf\longmapsto 1

User Elango
by
8.4k points
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