## anonymous one year ago Simplify the expression: cot x sin x - sin quantity pi divided by two minus x. + cos x

1. ali2x2

why dont you use wolfram or tiger-algebra

2. ali2x2

so easy too :P im not telling you you have to just a choice of action

3. anonymous

I could, but this helps teach me more.

4. anonymous

really need the equation tool for this almost impossible to read in english

5. anonymous

cot(x)sin(x)−sin((π2)−x)+cos(x)

6. ali2x2

ok

7. ali2x2

amazing how a mod agreed with me :3

8. ParthKohli

cot eks sin eks equals cos eks divided by sin eks times sin eks equals cos eks sin quantity pi divided by two minus eks equals cos eks so the expression boils down to cos eks minus cos eks plus cos eks

9. anonymous

Oh, and the answer choices are: cos(x) sin(x) 2sin(x) 2cos(x)

10. ali2x2

sin(x) + 2 cos(x)

11. ali2x2
12. anonymous

Yeah, @ParthKohli I got that part, but I can't figure out how to get one of the answer choices from it.

13. anonymous

Or at all, really....

14. anonymous

@ali2x2 That's not one of the possible answers.

15. anonymous

first off $\sin(\frac{\pi}{2}-x)=\cos(x)$

16. ali2x2

sorry that i couldnt help mabey @satellite73 will have better luck, MUCH BETTER LUCK

17. ali2x2

maybe

18. anonymous

@satellite73 That's an identity?

19. anonymous

@satellite73 ?

20. anonymous

Oh, whoops, @ParthKohli you solved it but it was confusing to look at, the final answer is cos(x).