Question

If cos (90-A)=0, then Sin (A+B)= ​

Answer 1

Answer:

Step-by-step explanation:

∴ sin(A + B) = sinB

Answer 2

Step-by-step explanation:

cos (90⁰ - A) = 0

→sinA \: = 0→sinA=0

→sinA = sin {0}→sinA=sin0

\underline \bold{→A = 0}

→A=0

Now,

\bold{sin (A+B)}sin(A+B)

= sin (0+B)=sin(0+B)

= \boxed{\bold{sin B}}=

sinB