Question

hey guys please answer my question and I'll mark u brainliest

Answer 1

tan 85 = cot (90-5) = cot 5

tan 5*cot 5=1

This will happen for all pairs except 45

So answer is tan 45=1

So, the final answer is 1.


OR

tan 5° tan 10° tan 15° ................. tan 75° tan 80° tan 85°
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= tan 5° tan 10° tan 15°.................tan(90-15)° tan(90-10)° tan(90-5)°

= tan 5° tan 10° tan 15° ................cot 15° cot 10° cot 5°

As tanΘ × cotΘ = 1

Then,

= 1 
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☺ ☺ ☺ Hope this Helps ☺ ☺ ☺

Answer 2

Hope it will help you dear.