Question

If ∆PQR is right angled at P then cos(Q+R)= ____
(a) 0
(b) 1/2
(c) 1/√2
(d)√3/2​

Answer 1

Answer:

0 option A)

<P+<Q+<R=180 degree

90 degree+<Q+<R=180 degree

<Q+<R=90 degree

Cos90=0

Sabharish G