Question

Cot 40°cot50°ka man kese Nikola ge

Answer 1

cot50°=cot (90-40)°

=tan40°

now,

cot40°tan40°=1 (tan thita×cot thita=1)

Answer 2

Answer: 1

Step-by-step explanation:

Given : cot 40° cot 50°

To find : The value of cot 40° cot 50°

Solution :

cot 40° cot 50° = cot 40° cot(90 - 40 )°

                         = cot 40° tan 40°

                         = 1

[∵ cot(90 - a) = tan a]

[∵ cot a . tan a = 1]

#SPJ2