AuB=B and AnB=A then find the value of A-B?
Answers
Answer:A
Step-by-step explanation:AnB=A so it take only intersected part and AuB=B it take whole union part but when we minus Ato B then A accepted only A part give same type of question in numerical then I can explain you better
Answer:
Step-by-step explanation:= (Tan 60 - tan 18) / (1+tan60 tan18) * (tan60 + tan18) / (1 - Tan60 tan18)
= (√3 - tan18) (√3 + tan18) / [ (1+√3 tan18)(1-√3 tan18) ]
= (3 - tan²18) / (1 - 3 tan²18) ---- (1)
= (3 Cos²18 - Sin²18) / (Cos²18 - 3 Sin²18)
= (3 - 4 Sin²18) / (4 Cos²18 - 3)
= [ Sin 3*18 / Sin 18 ] / [ Cos 3*18 / Cos 18 ]
= Tan 54 / Tan 18 ---- (2)
from the formula Sin 3A = sinA (3 - 4 sin²A) and Cos3A = CosA (4 Cos²A - 3)
Tan 6 Tan 66