Question

if cos 2x is equal to Cos 60 degree into cos 30 degree + sin 60 degree into sin 30 degree find sin 2x​

Answer 1

cos 60 is 1/2

cos30 is √3/2

sin60 is √3/2

sin30 is 1/2

so cos60 × cos 30 + sin60 × sin30 = 2×(√3/4)= √3/2

cosx = √3/2

therefore x = 60

Answer 2

Step-by-step explanation:

please check the attach ment