Question

tan5tan25tan45tan65tan85=1

Answer 1

I hope it will help you......

Answer 2

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Cot∅=tan(90°-∅)

Tan∅=cot(90°-∅)

According to the Question!!!!

tan5tan25tan45tan65tan85

(tan 5×tan 85)(tan25×tan65)×tan45°

[tan5×tan(90°-5) ][tan 25×tan(90-25°)][tan 45°]

tan 5°×cot5°×tan25°×cot 25°}[tan 45°]

1×1×tan45°

1×1×1

1

Hence,

LHS=RHS