If a is acute and cosa=5/13 find cos2a

Note that the double angle identity states that

Knowing the value of , we can easily deduce the value of from the fundamental trigonometry identity:

Which in your case evaluates to

Now we can pulug these values in the double angle identity:

$655.61 which is option c

step-by-step explanation:

price of house =   $146,000

initial rate = 3.5%

mortgaged paid in this = 3.5 % of $146,000

                                        =

                                        =$5110

the total years would be = 7

total mortgaged paid = 7 * $5110

                                      =$35770

remaining money = $146000-35770

                                =$110230

new mortgaged payment = 5 % of 110230

                                            =  

                                            =$655.61

m

step-by-step explanation: