value of `tan6^0tan42^0tan66^0tan78^0` is equal to - a) 1 b) 2 c) `1/4` d) `1/8`

127 views · Published 12 October 2018 · 3:35 · Indexed 2 October 2026

Channel: Doubtnut · 2018 · Education

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To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW value of `tan6^0tan42^0tan66^0tan78^0` is equal to -
a) 1 
b) 2 
c) `1/4` 
d) `1/8`

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