Question

In ΔPQR , ∠ Q = 90° , ∠P = θ , PQ = 12 , QR = 5 find cos θ. ​

Answer 1

In the pic it's clearly explained ,hope it helps...

Answer 2

cos x = 12/13

in triangle PQR , ANGLE Q IS 90

THEN,

FROM PYTHAGORAS THEOREM

PR = 13

THEN.

COS X = PQ/PR = 12/13