Question

cos 73pi/4

Answer 1

@ikram002p

Answer 2

@mayankdevnani

Answer 3

@No.name
\[\large \bf \cos(73 \times \frac{\pi}{4})=\cos(73 \times \frac{180}{4})=\cos(73 \times 45)=\cos(3285)\]

Answer 4

yes that i got

Answer 5

then,
\[\large \bf \cos[180(18)+45]=\cos(3285)\]
so it is a integral multiple of 180,so cos45 is answer
\[\large \bf \cos45^o=\frac{1}{\sqrt{2}}\]

Answer 6

understood? @No.name

Answer 7

yup yup

Answer 8

good

Answer 9

cos(180+theta) is negative right

Answer 10

yeah...so -cos45 is answer

Answer 11

but answer given is
cos 45 :P

Answer 12

answer is correct

Answer 13

yeah

Answer 14

because 180*18 and 18 is even number and then we add 45 to it,it belongs to I quadrant