Question

If A+ B= 90 then sin^A + sin^ B=
1.2
2.1
3.-1
4.0

Answer 1

option 2 : 1

Step-by-step explanation:

A+B= 90

A= 90-B

apply sin on both sides

sinA= sin(90-B)

sinA = cosB

substitute on given question

cos²B+ sin²B=1