Question

sin(pi/2)= cos ?

Answer 1

hint: sin(x)=cos(\(\pi/2-x\))

Answer 2

I'm very confused, can you explain how to do the question?

Answer 3

sin(x)=cos(π/2−x)
now you have
sin(pi/2)
which means that x=pi/2.
use the identity above to help you find the answer.

Answer 4

So would the answer just be pi?

Answer 5

sin(x)=cos(pi/2-x)
sin(pi/2)=cos(pi/2-pi/2)=?

Answer 6

so it would just be cos(0), correct?

Answer 7

correct! Well done! :)