Find: sin(arccos(3/5))

Find the exact value of csc105 degrees

Simplify: sin (x+y) - sin(x-y)

Prove that: sin2x/cotx = 1-cos2x

Find the exact value of sin(x+ pi/3)

I know thats a lot but any help would be amazing!!! I'm awful at this!!

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- May 6th 2008, 12:08 PMantz215trignometric simplify
Find: sin(arccos(3/5))

Find the exact value of csc105 degrees

Simplify: sin (x+y) - sin(x-y)

Prove that: sin2x/cotx = 1-cos2x

Find the exact value of sin(x+ pi/3)

I know thats a lot but any help would be amazing!!! I'm awful at this!! - May 6th 2008, 01:09 PMantz215
btw how do you make the pi symbol on here??j

- May 6th 2008, 01:16 PMMoo
Hello,

(see where arccos 3/5 lies and conclude about the sign of the sine)

Quote:

Find the exact value of csc105 degrees

Quote:

Simplify: sin (x+y) - sin(x-y)

Quote:

Prove that: sin2x/cotx = 1-cos2x

Quote:

Find the exact value of sin(x+ pi/3)

Quote:

btw how do you make the pi symbol on here??j

- May 6th 2008, 01:28 PMantz215
thank you! most of that made sense to me, but what didnt wasnt your fault!

- May 6th 2008, 01:31 PMMoo