Question

i Cos? A + Cog? B + Cog? C = 1 then
the value of Sin? A + Sin?B + Sin? C =​

Answer 1

Answer:

cosA.cosB+sinA.sinB.sinC=1

∠C=90

o

,∠A=∠B=45

o

a=2R.sinA,b=2R.sinB,C=2RsinC

⇒

c

a+b

=

2R[1]

2R[

2

1

+

2

1

]

=

1

2

=

2