3.3 4. a) If sin-a cos=0, Show thatsec. cosec=a +1/a Mathematics - Book VIII​

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13

85.3-64 = 21.3

so laura has already added 85.3 grams of chocolate powder and she has gone over the amount specified in the recipe by 21.3 grams

hope i ! have a great  day!

well what is the rest of your problem?