Q11 of 268 Page 4

If cot , then find the value of sin θ.


We know that,



Or



Let,


Side adjacent to angle θ =AB = 12k


The side opposite to angle θ =BC = 5k


where k is any positive integer


Firstly we have to find the value of AC.


So, we can find the value of AC with the help of Pythagoras theorem


(AB)2 + (BC)2 = (AC)2


(12k)2 + (5k)2 = (AC)2


(AC)2 = 144 k2 +25 k2


(AC)2 = 169 k2


AC =169 k2


AC =±13k


But side AC can’t be negative. So, AC = 13k


Now, we will find the sin θ



Side opposite to angle θ = BC = 5k


and Hypotenuse = AC = 13k


So,


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