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

We know that,

Or

Here,

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)

So,

Now, we know that,

Side adjacent to angle θ = AB =n

Hypotenuse = BC =√(m² + n²)

So,