Find the value of tan 5 tan 25 tan 30 tan 65 tan 85
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tan5=cot85
tan25=cot65
tan5 tan25 tan30 tan65 tan80
= cot85 cot65 tan30 tan65 tan80
=tan30*1*1
=tan30=1/√3
tan25=cot65
tan5 tan25 tan30 tan65 tan80
= cot85 cot65 tan30 tan65 tan80
=tan30*1*1
=tan30=1/√3
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