The period of 3cosx/5 is..???
Answer:
...a-b=4
a+b=6
→2a=10
→a=10/2 =5
we calculate b:
a-b=4
5-b=4
-b=4-5
b=1
→a=5; b=1
a²+b² = 5²+1² = 25+1 = 26
ab =5*1 = 5
it read Z minus four and 2/3 equals two and two thirds just to clear confusion that the 2 and 4 are not being multiplied by 2/3