Question

without using trigonometry table evaluate tan12°tan38°tan52°tan60°tan78°.​

Answer 1

Answer:

√3

Step-by-step explanation:

tan(90-78) tan(90-52) tan52 tan60 tan78

as tan(90-x)=cot x

cot78 cot 52 tan52 tan 60 tan78

as cot 78*tan78=1and cot52*tan52=1

only tan 60 will left

which is equal to √3