Question

show that tan 13 tan 37 tan 45 tan 53 tan 77 =1 guyzzz plzzz ASAP

Answer 1

We know tan(90-A)= cot A
So tan(90-77) tan(90-53) tan45 tan53 tan77
TanA×cotA=1
Tan45=1
So cot77°×cot53° ×1× tan53×tan77
1×1×1=1
Hence proved

Answer 2

As we know that

tan ∅ = cot ( 90 - ∅ )


and tan∅ = 1/cot∅

So using this we can solve .