Question

If A = 30° and B = 60°, verify that
(i)sin(A+B)=sinAcosB+cosAsinB .
(ii)cos(A+B)=cosAsinB-sinAcosB

Answer 1

Answer:

sin30=1/2

sin60=

$sin60 = \sqrt{3 \: \div 4}$

$cos30 = \sqrt{3 \div 4}$

cos60=1/2

substitute the values in the questions