solve cos &#x2061;<!-- ⁡ --> 2 x &#x2212;<!-- - --> 5 sin &#x2061;<!-- ⁡ --> x

Lovellss

Lovellss

Answered question

2022-06-14

solve cos 2 x 5 sin x + 2 = 0 , 0 x 360

Answer & Explanation

Ryan Newman

Ryan Newman

Beginner2022-06-15Added 26 answers

Your factorization is wrong. From the line 2 s i n 2 x 5 s i n x + 3 = 0 you have
u = s i n x
2 s i n 2 x 5 s i n x + 3 = 0 2 u 2 5 x + 3 = 0
( 2 u 3 ) ( u 1 ) = 0
2 u 3 = 0 u = 3 2
s i n x = 3 2 x C
u 1 = 0 s i n x = 1
x = 90 o

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