5. How many 6-digit numbers can be formed from the digits 0, 1, 3, 5, 7 and 9 which are divisible by 10 and no digit is repeated ? Permutations and Combinations Miscellaneous Exercise Previous Next Class 11 Permutations and…
4. If the different permutations of all the letter of the word EXAMINATION are listed as in a dictionary, how many words are there in this list before the first word starting with E ? Permutations and Combinations Miscellaneous Exercise…
3. A committee of 7 has to be formed from 9 boys and 4 girls. In how many ways can this be done when the committee consists of:(i) exactly 3 girls ?(ii) atleast 3 girls ?(iii) atmost 3 girls ?…
2. How many words, with or without meaning, can be formed using all the letters of the word EQUATION at a time so that the vowels and consonants occur together? Permutations and Combinations Miscellaneous Exercise Previous Next Class 11 Permutations…
1. How many words, with or without meaning, each of 2 vowels and 3 consonants can be formed from the letters of the word DAUGHTER? Permutations and Combinations Miscellaneous Exercise Previous Next Class 11 Permutations and Combinations Miscellaneous Exercise 1. How…
10. Find: (sin{frac{x}{2}}, cos{frac{x}{2}}) and (tan{frac{x}{2}}), if (sin x{=}frac{1}{4}), x in quadrant II. Trigonometric Functions Miscellaneous Exercise Previous Next Class 11 Trigonometric Functions Miscellaneous Exercise 1. Prove that: (2cos{frac{pi}{13}}cos{frac{9pi}{13}}+cos{frac{3pi}{13}}+cos{frac{5pi}{13}}=0). 2. Prove that: (left(sin{3x}+sin{x}right)sin{x}+left(cos{3x}-cos{x}right)cos{x}=0). 3. Prove that: (left(cos{x}+cos{y}right)^2+left(sin{x}-sin{y}right)^2=4{cos}^2{frac{x+y}{2}}). 4. Prove that: (left(cos{x}-cos{y}right)^2+left(sin{x}-sin{y}right)^2=4{sin}^2{frac{x-y}{2}}).…
9. Find: (sin{frac{x}{2}}, cos{frac{x}{2}}) and (tan{frac{x}{2}}), if (cos{x}=-frac{1}{3}), x in quadrant III. Trigonometric Functions Miscellaneous Exercise Previous Next Class 11 Trigonometric Functions Miscellaneous Exercise 1. Prove that: (2cos{frac{pi}{13}}cos{frac{9pi}{13}}+cos{frac{3pi}{13}}+cos{frac{5pi}{13}}=0). 2. Prove that: (left(sin{3x}+sin{x}right)sin{x}+left(cos{3x}-cos{x}right)cos{x}=0). 3. Prove that: (left(cos{x}+cos{y}right)^2+left(sin{x}-sin{y}right)^2=4{cos}^2{frac{x+y}{2}}). 4. Prove that: (left(cos{x}-cos{y}right)^2+left(sin{x}-sin{y}right)^2=4{sin}^2{frac{x-y}{2}}). 5.…
8. Find: (sin{frac{x}{2}}, cos{frac{x}{2}}) and (tan{frac{x}{2}}), if (tan{x}=-frac{4}{3}), x in quadrant II. Trigonometric Functions Miscellaneous Exercise Previous Next Class 11 Trigonometric Functions Miscellaneous Exercise 1. Prove that: (2cos{frac{pi}{13}}cos{frac{9pi}{13}}+cos{frac{3pi}{13}}+cos{frac{5pi}{13}}=0). 2. Prove that: (left(sin{3x}+sin{x}right)sin{x}+left(cos{3x}-cos{x}right)cos{x}=0). 3. Prove that: (left(cos{x}+cos{y}right)^2+left(sin{x}-sin{y}right)^2=4{cos}^2{frac{x+y}{2}}). 4. Prove that: (left(cos{x}-cos{y}right)^2+left(sin{x}-sin{y}right)^2=4{sin}^2{frac{x-y}{2}}). 5.…
7. Prove that: (sin{3}x+sin{2}x-sin{x}=4sin{x}cos{frac{x}{2}}cos{frac{3x}{2}}). Trigonometric Functions Miscellaneous Exercise Previous Next Class 11 Trigonometric Functions Miscellaneous Exercise 1. Prove that: (2cos{frac{pi}{13}}cos{frac{9pi}{13}}+cos{frac{3pi}{13}}+cos{frac{5pi}{13}}=0). 2. Prove that: (left(sin{3x}+sin{x}right)sin{x}+left(cos{3x}-cos{x}right)cos{x}=0). 3. Prove that: (left(cos{x}+cos{y}right)^2+left(sin{x}-sin{y}right)^2=4{cos}^2{frac{x+y}{2}}). 4. Prove that: (left(cos{x}-cos{y}right)^2+left(sin{x}-sin{y}right)^2=4{sin}^2{frac{x-y}{2}}). 5. Prove that: (sin{x}+sin{3x}+sin{5x}+sin{7x}=4cos{x} cos{2x} sin{4x}). 6. Prove that:…
6. Prove that: (frac{left(sin{7}x+sin{5}xright)+left(sin{9}x+sin{3}xright)}{left(cos{7}x+cos{5}xright)+left(cos{9}x+cos{3}xright)}=tan{6}x). Trigonometric Functions Miscellaneous Exercise Previous Next Class 11 Trigonometric Functions Miscellaneous Exercise 1. Prove that: (2cos{frac{pi}{13}}cos{frac{9pi}{13}}+cos{frac{3pi}{13}}+cos{frac{5pi}{13}}=0). 2. Prove that: (left(sin{3x}+sin{x}right)sin{x}+left(cos{3x}-cos{x}right)cos{x}=0). 3. Prove that: (left(cos{x}+cos{y}right)^2+left(sin{x}-sin{y}right)^2=4{cos}^2{frac{x+y}{2}}). 4. Prove that: (left(cos{x}-cos{y}right)^2+left(sin{x}-sin{y}right)^2=4{sin}^2{frac{x-y}{2}}). 5. Prove that: (sin{x}+sin{3x}+sin{5x}+sin{7x}=4cos{x} cos{2x} sin{4x}). 6. Prove that:…
