Question

which one of the following represents the value of tan72°/cot18°-cot72°/tan18°?​

Answer 1

Answer:

0

Step-by-step explanation:

tan72°/cot18°-cot72°/tan18°

tan72°/cot(90°-72°)-cot72°/tan(90°-72°)

tan72°/tan72°-cot72°/cot72°. [cot(90°-a)=tana,tan(90-a)=cota]

1-1=0