Is the position of a star as seen by us its true position? Justify your answer.

False , the value if tan 60° = √3= 1.73 True, The value of sec A increase from 1 to ∞. False, Cos A is the abbreviation used for the cosine of angle...

Solution: (i) It is not true, in general. This relation is true for some particular values of A and B. For example, if A = 0 and B = 90, Then, Sin (A+B)...

(i) False As 3 ∈ {2, 3, 4, 5}, 3 ∈ {3, 6} ⇒ {2, 3, 4, 5} ∩ {3, 6} = {3}  (ii) False As a ∈ {a, e, i,...

False  Let   A = {0, 1} and B = {1, 2}  7  ∴ A ∪ B = {0, 1, 2}  P(A) = {Φ, {0}, {1},{0, 1}} P(B) = {Φ, {1}, {2}, {1, 2}}  P(A...

Solution: True. Justification: At least one out of every three consecutive positive integers is divisible by 2. Therefore, The product of three consecutive positive integers is divisible by 2. At least one out of every...

Regular exercise always promotes healthy aging process. Getting older is a regular cycle of life. Regular exercise delays the changes which occur due to ageing. The role of regular exercise...

No, light from stars undergoes atmospheric refraction which occurs in a medium of gradually changing refractive index.

True, because n(n+1)(n+2) will always be divisible by 6, as least one of the factors will be divisible by 2 and at one of the factors will be divisible by...

(i) False As 3 ∈ {2, 3, 4, 5}, 3 ∈ {3, 6} ⇒ {2, 3, 4, 5} ∩ {3, 6} = {3} (ii) False As a ∈ {a, e, i, o, u}, a...

False Let A = {0, 1} and B = {1, 2} ∴ A ∪ B = {0, 1, 2} P(A) = {Φ, {0}, {1}, {0, 1}} P(B) = {Φ, {1}, {2}, {1, 2}} P(A ∪...