Question: Without using a calculator, write down the values of: a. sin (90) b. sin 450 c. sin 540 d. sin (450) e. cos (180) f.

Without using a calculator, write down the values of:

a. sin (−90°) 

b. sin 450° 

c. sin 540° 

d. sin (−450°) 

e. cos (−180°)

f. cos (−270°) 

g. cos 270° 

h. cos 810° 

i. tan 360° 

j. tan (−180°)

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