Question

if in ABC b=90 ab=12cm and bc=5cm than find the value cosc​

Answer 1

Answer:

from phythogerous theorem

Answer 2

Step-by-step explanation:

triangle ABC is right angled triangle

so AC^2+BC^2=AC^2

i.e 12^2+5^2=AC^2

144+25=AC^2

AC=✓169

AC=13

CosC=Adjacent/hypotenuse

CosC=5/13