1. What basic trigonometric identity would you use to verify that cot x sin x = cos x? ...
a. cos^2x+sin^2x=1.
b. cot x = cosx/sinx.
c. cos x = 1/sec x.
d. sin x = 1/csc x ...
2. What basic trigonometric identity would you use to verify that sin^2x+cos^2x/cosx = sec x?.
a. sin x=1/csc x.
b. 1+cot^2x=csc^2x.
c. cos^2x+sin^2x=1.
d. cos x = 1/sec x
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