Question

If A+B+C = 90° then sin ^2A + sin^2B + sin^2 C =
1) 1-2 sinA sinB sin
3) 1 + 2 cosA cosB cosC
2) 1 + 2 sinA sinB sinC
4) 1-2 cosA cosB cosC​

Answer 1

Answer:

2) 1 + 2 sinA sinB sinC.......