Question

Mathematics geometry question. triangle abc

Answer 1

This will be s - r.

Explanation:

Here,

SinB = r

CosB = s

SinB = AC/BC

Also,

CosC = AC/ BC

So, we can say SinB = CosC = r

Again,

CosB = AB/ BC

Also,

SinC = AB/ BC

So,

CosB= SinC = s

So,

SinC - CosC = s - r