Question

if cot A=tan B , then trigonometric identity is

pls help me​

Answer 1

Answer:

answer is 0

Step-by-step explanation:

Cot A = Tan B

then A = 30

B = 60

cos ( 30+60)= cos 90= 0

Answer 2

cot A = tan B

=> tan (π/2 - A) = tan B

By comparing both ;

=> π/2 - A = B

=> A+B = π/2

Now ;

Cos (A+B) = cos π/2

=> 0

So, The final answer is (a)