Q. 22 B4.8( 6 Votes )

Given calculate all other trigonometric ratios.

Answer :


We know that,


BC = 12k and AC = 13k

where, k is any positive integer.

In right angled ∆ABC, we have

(AB)2 + (BC)2 = (AC)2 [by using Pythagoras theorem]

(AB)2 + (12k)2 = (13k )2

(AB)2 + 144k2 = 169k2

(AB)2 = 169k2 – 144k2

(AB)2 = 25k2

AB = 25k2

AB =±5k [taking positive square root since, side cannot be negative]

Now, we have to find the value of other trigonometric ratios.

We, know that

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