Question

anyone solve this plz..........$<marquee scrollamount = 8 >Don't spam </marquee>$​

Answer 1

STEP BY STEP EXPLANATION GIVEN IN THE ABOVE PIC

Answer 2

1/2 cos pie/5. ( pie=180)

1/2 cos 180/5

1/2 cos 36

1/2 (1+√5)/4

that is

1+√5/8

here is ur answer ⬆⬆