Question

The value of tan 5 .tan25 .tan30.tan65 .tan85

Answer 1

hey there here is ur answer..

(tan5. tan85. tan25. tan65) tan30
[tan(90-85).tan85. tan(90-65).tan65]tan30
(cot85.tan85.cot65.tan65)tan30-------------[tan(90-@)=cot@]
$(1 \times 1) \frac{1}{ \sqrt{3} } \: \: \: \: \: \: (tan30 = \frac{1}{ \sqrt{3} } ) \\ = \frac{1}{ \sqrt{3} } \: \: \: \: \: \: is \: the \: ans$