Sin (90-x) = cos x
so x = 40
3 equivalent ratios or 5/2
10 /4
20/8
30/12
Given :-
- First term of an AP is -17 .
- Common difference is 5 .
To Find :-
- The formula for the nth term .
Solution :-
We know that the nth term of an AP is given by ,
where ,
- a is the First term .
- n is the number of the term .
- d is the common difference .
- T_n is the nth term .
On substituting the respective values we have ,

Open the brackets ,
Simplify ,
<u>Hence</u><u> the</u><u> </u><u>nth </u><u>term</u><u> of</u><u> </u><u>the</u><u> </u><u>AP </u><u>is </u><u>given</u><u> </u><u>by </u><u>5</u><u>n</u><u> </u><u>-</u><u>2</u><u>2</u><u>.</u>
<em>I </em><em>hope</em><em> this</em><em> helps</em><em>.</em>
Area of a triangle =

.
a=7
b=10
The largest possible value for sin(C) is 1, which is sin(90)
So area =