SOLUTION: 13. Find the exact value of sin 30 � - sin 45 � cos 45 � . a. 0 b. 1/2 c. 1 d. 2 *I simplified the equation to (1/2)(4)�-(2)�/(4)�, then I got stuck. Please help me and

Question 329103: 13. Find the exact value of sin 30 � - sin 45 � cos 45 � .
a. 0
b. 1/2
c. 1
d. 2
*I simplified the equation to (1/2)(4)�-(2)�/(4)�, then I got stuck. Please help me and I thank you for your time.

Found 3 solutions by Fombitz, Alan3354, bjkblr2:
Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
Get rid of the degree symbols in your solution.
Not sure where the 4 in the first term came from because

Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
Find the exact value of sin 30 � - sin 45 � cos 45 �
=
= 1/2 - 1/2
= 0

Answer by bjkblr2(1)   (Show Source): You can put this solution on YOUR website!
The answer is 0
because sin30=1/2 and sin45=cos45=1/square root 2
there fore sin30-sin45 * cos45 =1/2 - 1/2 =0 ( because 1/square root2 *1/square root2 = 1/2

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