Question

Find x without using calculator sin^2 27 + Cos^2 27 - x Cos^2 30 =4​

Answer 1

sin^2 27 + cos^2 27 -xcos^2 30 =4

1-x×√3/2^2=4

1-3x/4 = 4

4-3x= 16

-3x= 16-4

-3x =12

x = -12/3

x = -4