Question

Cos 48 sin 18 -sin48 cos 18=-1/2

Answer 1

Answer:

wrong question

Cos 48 sin 42° -sin48 cos 42°

ye hona chahiye ......

Answer 2

Step-by-step explanation:

cos48°.sin18°-sin48°.cos18°=-1/2

take L.H.S

{cosA.sinB-sinA.cosB =Cos(A+B)}

cos(48°+18°)=-1/2

cos(66°)=-1/2