How do I find the value of sin 225?

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Mar 1, 2018

Answer:

#-1/sqrt2#

Explanation:

#sin225^@=sin(180^@+45^@)#

#=sin180^@cos45^@+cos180^@sin45^@#

#=(0)(1/sqrt2)+(-1)1/sqrt2#

=#-1/sqrt2#

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