Question

if sin alpha equals to half show that 3 cos alpha minus 4 cos cube Alpha equals to zero​

Answer 1

⭐《ANSWER》

$\huge\mathfrak\pink {ANSWER}$

↪Actually welcome to the Concept of the TRIGONOMETRY

↪Basically here , from the given parameter

↪we get as

↪Sin alpha = 1/2

↪thus , alpha = sin^-1 (1/2)

↪thus , alpha = 30°

↪now substituing the value of alpha in the expression , we get result as ZERO