Q. 164.2( 5 Votes )

If , then find the values of cos θ and sin θ.

Answer :

We know that,



So, Side opposite to angle θ =AC = m

The side adjacent to angle θ =AB = n

Firstly we have to find the value of BC.

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

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

(n)2 + (m)2 = (BC)2

(BC)2 = m2 + n2

BC = m2 + n2

So, BC =√(m2 + n2)

Now, we will find the sin B and cos B

Side opposite to angle θ = AC = m

and Hypotenuse = BC =√(m2 + n2)


Now, we know that,

Side adjacent to angle θ = AB =n

Hypotenuse = BC =√(m2 + n2)


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