Question

cos^2pie/8+cos^2 3pie/8 +cos^2 5pie/8 +cos^2 7pie/8 =2

Answer 1

Step-by-step explanation:

(4√3-2√2)(3√2+4√3)

=4√3(3√2+4√3)-2√2(3√2+4√3)

=12√6+16(3)-6(2)-8√6

=12√6+48-12-8√6

=4√6+36