Q294
If cosA + cosB + cosC = 3, then what is the value of sinA + sinB + sinC?
A.
1
B.
2
C.
0
AnswerD.
-1
Answer: Option C
Solution
Answer: Option C
Solution:
cosA + cosB + cosC = 3⇒ putting A, B, C = 0
1 + 1 + 1 = 3
3 = 3 Satisfied
So, sinA + sinB + sinC
= sin0° + sin0° + sin0°
= 0 + 0 + 0
= 0