Question

cos c + sin c=0 what is the value of c and how

Answer 1

c= 45°

cos C - sin C =0

√(1- sin²C) -sin C =0

Squaring both sides... We get

1 - sin²C + sin²C - 2.sin C(√1-sin²C)=0

1=2. sin C. cos C

1= sin 2C

2C = 90°

c=π/4 ie., 45°