Question

Find the exact value of sin157.5 in half angle identities

Answer 1

kk ! your answer :) ?!

Answer 2

i will send it to you right now

Answer 3

kk !

Answer 4

i need to find it in half angle identities

Answer 5

you're right ! @lsugano

Answer 6

but the answer book, it said \[\sqrt{\left(\begin{matrix}2-\sqrt{2} \\ 2\end{matrix}\right)}\]

Answer 7

i cant get this answer

Answer 8

is this what you meant : \[\sqrt{\frac{2-\sqrt{2}}{4}}\]

Answer 9

yes! sorry i dont know how to use this equation bar haha

Answer 10

the answer is that but i cant get it

Answer 11

in your attached pic you got it .....well almost.
just divide :D

Answer 12

like this ?

Answer 13

Exactly!