Question 492294
By using the even-odd properties to find the exact value of each expression. 
sin(-135(degrees)) 
sec(-pi) 
tan( (-pi) / (3) ) 
I apologize for three questions but they are all related.
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Even function: f(-x)=f(x)
Odd function: f(-x)=-f(x)
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sin is an odd function
135º is in quadrant II where the reference angle=45º
Sin 135º=√2/2
Sin (-135º)=-√2/2 
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sec is an even function
sec π=1/cos π=1/-1=-1
sec(-π)=-1 
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tan is an odd function
π/3=60º in quadrant I
tan π/3=√3
tan -π/3=-√3