Prove that <msqrt> 3 </msqrt> cos &#x2061;<!-- ⁡ --> ( x ) + sin

Anthony Kramer 2022-05-24 Answered
Prove that 3 cos ( x ) + sin ( x ) = 2 cos ( x π 6 )
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Answers (1)

Michaela Alvarado
Answered 2022-05-25 Author has 11 answers
In the right side you can use:
cos ( α β ) = cos α cos β + sin α sin β
In this case:
cos ( x π 6 ) = cos x cos π 6 + sin x sin π 6 cos ( x π 6 ) = 3 2 cos x + 1 2 sin x
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