Mathematics: The equation 3sinx+cos^2x=2 is solved below ! !

Scalene because none of the side lengths match. take the following notes: equilateral- all sides the same isosceles- 2 sides the same scalene - none of the sides are the same....

The equation 3sinx+cos^2x=2 is solved below !

Ответ:

saucyboyFredo

14.03.2022

Mathematics

We have that
3sin x+cos²x=2
3sin x+(1-sin²x)=2
-sin²x +3sin x=1
sin²x -3 sin x+1=0> up to here the procedure is correct
let
A=sin x
then
A²-3A+1=0

Group terms that contain the same variable, and move the constant to the opposite side of the equation

(A²-3A)=-1

Complete the square. Remember to balance the equation by adding the same constants to each side.

(A²-3A+2.25)=-1+2.25

Rewrite as perfect squares

(A-1.5)²=1.25

(+/-)(A-1.5)=1.12

first solution

(A-1.5)=1.12> A=1.12+1.5> A=2.62> sin x=2.62

second solution

-(A-1.5)=1.12> -A+1.5=1.12> A=1.5-1.12> A=0.38---> sin x=0.38

the answer is

the equation was factored incorrectly

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The equation 3sinx+cos^2x=2 is solved below ! !

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