Question

please help me........​

Answer 1

4+ cosec 11 sec 79 - cot 11 tan 79

=4+sec(90-11)sec79 - tan(90-11)tan 79

=4 + sec79 sec79 - tan 79 tan 79

=4+ (sec^2 79 - tan^2 79)

=4+1

=5

so mate 5 is the required answer