The sum identity for sine is sin(a + B) = as the sum 30° + 45° , use the sum identity for sine to find the exact value of sin75°, You will need the sines and cosines of 30° and 45° in this problem. Do not use a calculator sin(a) cos(ß) + cos(a) sin(ß). By writing the angle 75
Permutations and Combinations
If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.
Counting Theory
The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.
I dont understand questions 4, 5 and 6! Please help!
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