Question

tan 48 * tab 23 * tan42*tan67​

Answer 1

Answer:

1

Step-by-step explanation:

formula used----------->

________________

1.tan(90*-¤)=cot¤

1

2 tan¤ = ------------------

cot¤

Now

tan48*tan23*tan42*tan67*

= tan(90*-42*)tan(90*-67*)tan42*tan67*

1 1

= cot42* cot67* ------------ -------------

cot42* cot67*

= 1

Answer 2

Answer:

Step-by-step explanation:

tan 48° tan 23° tan 42° tan 67°=1

=tan(99°-42°) tan(90°-67°) tan42° tan 67°

=cot42° cot67° tan42° tan67°

=[cot42° tan42°] [cot67° tan67°]

=1×1

=1