Question

Tan9°. tan27°. tan45°. tan72°. tan81°= 1​

could u plz solve it with clear process

Answer 1

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`