Question

Cos x= cos 60 degree into cos 30 degree + sin 60 degree into sin 30 degree find x

Answer 1

Step-by-step explanation:

cos 60degree=1/2

cos 30 degree=√3/2

sin 60degree=√3/2

sin 30 degree=1/2

cos x= 1/2 * √3/2 +√3/2 *1/2,

          = √3/4 + √3/4,

           = 2√3/4,

         = √3/2

cos x = cos 30degree ans

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