State whether the following are true or false. Justify your answer.

Monjur Alahi

(i) The value of tan A is always less than 1. 

(ii) sec A = 12/5 for some value of angle A. 

(iii) cos A is the abbreviation used for the cosecant of angle A. 

(iv) cot A is the product of cot and A. 

(v) sin θ = 4/3 for some angle θ .


0 like 0 dislike
1 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

  1. False , the value if tan 60° = √3= 1.73
  2. True, The value of sec A increase from 1 to ∞.
  3. False, Cos A is the abbreviation used for the cosine of angle A
  4. False, cot A is one symbol. We cannot separate it
  5. False, The value of sin θ always lies between 0 and 0 and 4/3 > 1

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
State whether the following are true or false. Justify your answer. (i) sin (A + B) = sin A + sin B.

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)...

1 Answers 1 views
State whether each of the following statement is true or false. Justify your answer.

(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,...

1 Answers 1 views
“The product of three consecutive positive integers is divisible by 6”. Is this statement true or false? Justify your answer.

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...

1 Answers 3 views
State whether the following statements are true or false. In case a statement is false, write the corrected statement in your notebook.

(a) Cutting a log of wood into pieces is a chemical change. (False) (b) Formation of manure from leaves is a physical change. (False) (c) Iron pipes coated with zinc do not...

1 Answers 1 views
State whether the following statements are True or False. If false, correct them

a) True (b) False, generally sheep are reared. (c) False, it is sericulture. (d) True (e) False, used to make woollen fabric.

1 Answers 1 views
State whether the following statements are true or false. Correct the false statements.

(a) False. Substances can be neutral as well. (b) False. Acids do not turn all indicators red. (c) True (d) False. It does not change the colour of litmus at all. (e) False. It...

1 Answers 1 views
State whether the following statements are True or False. Correct the false statements. (a) It is easy to predict weather rather than climate.

(a) False, it is easy to predict the climate rather than the weather. (b) False, (since very few prey are available) polar bear need to have a strong sense of smell. (c)...

1 Answers 1 views
State whether the following statements are True or False. If false, write the correct statement.

(a) True  (b) False, snow is also a solid form of water.  (c) True  (d) True

1 Answers 1 views
The product of three consecutive positive integers is divisible by 6' . Is this statement true or false? justify your answer

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...

1 Answers 1 views
State whether each of the following statement is true or false. Justify your answer

(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...

1 Answers 1 views
X