Question

Tan theta x tan (90 - theta)=​

Answer 1

☘︎αηѕωєr☘︎

☯︎☯︎☯︎☯︎☯︎☯︎☯︎

STD full form is Subscriber Trunk Dialling. ISD full form is International Subscriber Dialling. PCO full form is Public Call Office.

Answer 2

-COT Thetha is the answer if u want proof of that then ask