Question

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

Answer 1

cos 2x = cos 60° cos 30° +sin 60° +sin 30°

⇒ 2x = (1/2)*(√3/2)+(√3/2)+(1/2)

⇒ 2x = (√3/4)+(√3/2)+(1/2)

⇒2x = (√3+2√3+2)/4

⇒ 2x = (3√3+2)/4

⇒x = (3√3+2)/(4*2)

⇒x=(3√3+2)/8

Answer 2

Step-by-step explanation:

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