CBSE Maths 12 Science Vector Algebra MCQ Solutions in English to enable students to get Solutions in a narrative video format for the specific question.
Expert Teacher provides CBSE Maths 12 Science Vector Algebra MCQ Solutions through Video Solutions in English language. This video solution will be useful for students to understand how to write an answer in exam in order to score more marks. This teacher uses a narrative style for a question from Vector Algebra not only to explain the proper method of answering question, but deriving right answer too.
Please find the question below and view the Solution in a narrative video format.
Question:
Solution Video in English:
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Question 1 : if a, b, c are unit vectors such that a + b + c = 0, then find the value of a.b + b.c + c.a. (View Answer Video)
Question 2 : Find the magnitude of two vectors a and b having the same magnitude and such that the angle between them is and their scalar product is 1/2. (View Answer Video)
Question 3 : Find the scalar and vector components of the vector with initial point (2, 1) and terminal point (-5, 7). (View Answer Video)
Question 4 : Find a vector in the direction of that has magnitude 7 units. (View Answer Video)
Question 5 : If a line has direction ratios 2, -1, -2, then what are its direction cosines? (View Answer Video)
Question 1 : Let R be the relation on the set {1, 2, 3, 4} given by R = {(1, 2), (2, 2), (1, 1), (4, 4), (1, 3), (3,3), (3,2)}. then R is, (View Answer Video)
Question 2 : Let defined as f(x) = 5 be a constant function. Then its range is (View Answer Video)
Question 3 : Let be defined as . Choose the correct answer. (View Answer Video)
Question 4 : Functions are defined respectively, by , find . (View Answer Video)
Question 5 : Number of binary operations on the set {a, b} are : (View Answer Video)
Question 1 : Find the principal value of sin-1 . (View Answer Video)
Question 2 : Solve for
(View Answer Video)
Question 3 : is equal to :
(View Answer Video)
Question 4 : Write the principal value of (View Answer Video)
Question 5 : If then write the value of x + y + xy. (View Answer Video)
Question 1 : How many times must a man toss a fair coin, so that the probability of having at least one head is more than 80%. (View Answer Video)
Question 2 : A and B throw a pair of dice alternately. A wins the game if he gets a total of 9 and B wins if he gets a total of 7. If A starts the game, find the probability of winning the game by B. (View Answer Video)
Question 3 : A girl throws a die. If she gets a 5 or 6, she tosses a coin three times and notes the number of heads. If she gets 1, 2, 3 or 4, she tosses a coin two times and notes the number of heads obtained. If she obtained exactly two heads, what is the probability that she threw 1, 2, 3, or 4 with the die? (View Answer Video)
Question 4 : Of the students in a college, it is known that 60% reside in hostel and 40% are day scholars (not residing in hostel). Previous year results report that 30% of all students who reside in hostel attain 'A' grade and 20% of day scholars attain 'A' grade in their annual examination. At the end of the year, one student is chosen at random from the college and he has an 'A' grade. What is the probability that the student is a hosteler? (View Answer Video)
Question 5 : A pair of dice is thrown 4 times. If getting a doublet is considered a success, find the probability distribution of number of successes. Hence, find the mean of the distribution. (View Answer Video)