Question

7 cos^2 x +7sin^ 2 x​

Answer 1

7 cos² x +7sin² x​ = 7(cos² x + sin² x​) = 7·1 = 7

Answer 2

$7 { cos(x) }^{2} + 7 { sin(x) }^{2} \ 7( { cos(x) }^{2} + { sin(x) }^{2} ) \ { sin(x) }^{2} + { cos(x) }^{2} = 1 \ 7 times 1 = 7$