Vector Algebra 12 Science Maths CBSE Answers for MCQ in English to enable students to get Answers in a narrative video format for the specific question.
Expert Teacher provides Vector Algebra 12 Science Maths CBSE Answers for MCQ through Video Answers 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 Answer in a narrative video format.
Question:
Answer Video in English:
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Question 1 : Find the unit vector in the direction of vector PQ, where P and Q are the points (1, 2, 3) and (4, 5, 6) respectively. (View Answer Video)
Question 2 : Find the scalar components of the vector with initial point A (2, 1) and terminal point B (-5, 7). (View Answer Video)
Question 3 : Find a vector in the direction of vector which has magnitude 21 units. (View Answer Video)
Question 4 : Find the sum of the vectors and (View Answer Video)
Question 5 : Find |x|, if for a unit vector a,(x - a).(x + a) = 12. (View Answer Video)
Question 1 : If a lines makes angle and with the positive directions of x-axis and z-axis respectively, then find the angle that it makes with the y-axis. (View Answer Video)
Question 2 : A line passes through the point with position vector and makes angles and with x, y and z-axis respectively. Find the equation of the line in the Cartesian form. (View Answer Video)
Question 3 : What is the distance of the point (p, q, r) from the x-axis ? (View Answer Video)
Question 4 : Find the angle between line and the plane 2x - y + 2z -13 = 0. (View Answer Video)
Question 5 : If the lines and are perpendicular to each other, then find the value of P. (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 couple has 2 children. Find the probability that both are boys, if it is known that the older child is boy. (View Answer Video)
Question 3 : One card is drawn from a pack of 52 cards. Find the probability of getting a jack of hearts:
(View Answer Video)
Question 4 : Bag I contains 3 red and 4 black balls and Bag II contains 4 red and 5 black balls. Two balls are transferred at random from Bag I to Bag II and then a ball is drawn from Bag II. The ball so drawn is found to be red in colour. Find the probability that the transferred balls were both black. (View Answer Video)
Question 5 : In a hockey match, both teams A and B scored same number of goals up to the end of the game, so to decide the winner, the referee asked both the captains to throw a die alternately and decided that the team, whose captain gets a six first, will be declared the winner. If the captain of the team A was asked to start, find their respective probabilities of winning the match and state whether the decision of the referee was fair or not. (View Answer Video)
Question 1 : If , then x is equal to, (View Answer Video)
Question 2 : Evaluate the determinants:. (View Answer Video)
Question 3 : Evaluate the determinant: . (View Answer Video)
Question 4 : Find the area of the triangle with vertices at the points (2, 7), (1, 1), (10, 8). (View Answer Video)
Question 5 : If find |A|. (View Answer Video)