## anonymous one year ago sin(pi/2)= cos ?

1. mathmate

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

2. anonymous

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

3. mathmate

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.

4. anonymous

So would the answer just be pi?

5. mathmate

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

6. anonymous

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

7. mathmate

correct! Well done! :)