value of tan5° tan10° tan15° tan20° till tan85°
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Answered by
48
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
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
Answered by
36
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 ☺ ☺ ☺
______________________________________________________
= 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
______________________________________________________
☺ ☺ ☺ Hope this Helps ☺ ☺ ☺
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