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Dictionary Rank of a Word | Permutations & Combinations

 PERMUTATIONS & COMBINATIONS Rank of the word or Dictionary order of the English words like COMPUTER, COLLEGE, SUCCESS, SOCCER, RAIN, FATHER, etc. Dictionary Rank of a Word Method of finding the Rank (Dictionary Order) of the word  “R A I N” Given word: R A I N Total letters = 4 Letters in alphabetical order: A, I, N, R No. of words formed starting with A = 3! = 6 No. of words formed starting with I = 3! = 6 No. of words formed starting with N = 3! = 6 After N there is R which is required R ----- Required A ---- Required I ---- Required N ---- Required RAIN ----- 1 word   RANK OF THE WORD “R A I N” A….. = 3! = 6 I……. = 3! = 6 N….. = 3! = 6 R…A…I…N = 1 word 6 6 6 1 TOTAL 19 Rank of “R A I N” is 19 Method of finding the Rank (Dictionary Order) of the word  “F A T H E R” Given word is :  "F A T H E R" In alphabetical order: A, E, F, H, R, T Words beginni

Math Assignment Class XI Ch-3 | Trigonometric Functions

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Math Assignment / Class XI / Chapter 3 /  Trigonometric Functions Extra questions of chapter 3 class 11 Trigonometric Functions with answer and  hints to the difficult questions. Important and useful math. assignment for the students of class 11 For better results Students should learn all the basic points of Trigonometry up to 11th standard Student should revise NCERT book thoroughly with examples. Now revise this assignment. This assignment integrate the knowledge of the students. ASSIGNMENT FOR XI  STANDARD TRIGONOMETRY Question 1 Find the degree measure for the following radian measure Question 2 Find the radian measure for the following degree measure Question 3 Find the magnitude, radian and degree, of the interior angles of a regular Question 4 If sin  θ  =12/13 and  θ  lie in the second quadrant, then find the value of sec θ  + tan θ.   ………………    Ans. [- 5] Question 5 Prove the followings   i)   cos24 o  + cos 55 o

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