Answer:
tana + tanb
Step-by-step explanation:
Using the trigonometric identities
• sin(a + b) = sinacosb + cosasinb
• tanx = 
, then
= 
= 
+ 
= 
+ 
= tana + tanb
Answer:
135 In the 3rd year
Step-by-step explanation:
240-35= 205
205-35=170
170-35=135 (Or just use a calculator)
43 leaves from cathy + 38 leaves from jan = 81 leaves
Answer:
√1924=43.86
Step-by-step explanation:
√(x2-x1)^2+(y2-y1)^2=√1924=43.86
So to begin your problem, you know that your car already has an average which is 65km/45 mins. The problem wants you to change this to km/hr. This means that you need to convert minutes to hours. A simple way to do this is by using fractions.
Set your problem up with fractions similar to this:
65km/45 mins x 60 mins/1 hr.
the whole point is to cancel out your minutes, and leave the hours as your new unit for the denominator
65km/45 x 60/1 hr.
now you want to reduce (I divided the first fraction by 5)
13km/9 x 60/1 hr.
780km/9hrs.
That would be your answer. If someone can double check my math that would be fantastic.
