so that mean the total surface area need to -\pir^2(top circle)?
how about the method ? is that correct? because late need to dy/dx...
can someone help to correct or circle the wrong part?pls ...
Homework Statement
show that the expression 8 cos^2 x -6 sin x cos x +2 may be expressed in the form rcos (2x+α)+s ,and determine the value of the constants r,s and α.hence ,or otherwise, find the greatest and latest values of the expression as x varies.
Homework Equations
cos...
Homework Statement
1)a student saves his pocket money with the intention to buy an encyclopedia set costing RM1200.If he saves RM50 in the bank each month and the bank pays him an interest of ½ % per month , how many months has he got to saves before he can afford to buy the encyclopedia...