Question #2c4b0

1 Answer
Sunayan S · sjc
Feb 26, 2018

See the answer below...

Explanation:

#tan1^@ cdot tan2^@ cdot tan3^@ ... tan 88^@ cdot tan89^@#

#=tan1^@ cdot tan2^@ cdot tan3^@" " ..." " tan45^@" "..." "tan (90-2)^@ cdot tan(90-1)^@#

#=tan1^@ cdot tan2^@" ... "tan45^@" ... "cot2^@ cdot cot1^@#

#=(tan1^@ cdot cot1^@) cdot (tan2^@ cdot cot2^@)" ... "(tan44^@ cot44^@) cdot tan45^@#

#=1 cdot 1 cdot 1 cdot 1" ... "#

#=1#

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