book Maths Puzzle Numerical Ability

find the exact value of cos 105 degrees WITHOUT USING TABLES OR A CALCULATOR. be sure to show your work.

Read Solution (Total 0)

book Other Question

Can someone tell me how to solve the following problem:
7(2+3x)+8 Five years ago, a man was seven times as old as his son. Five years hence, father will be three times as old as his son. Find their present ages.