Question: Use graphs to determine which of these equations may be identities. a. cosx = xin(/2 - x) b. cos x = sin (x - /2)

Use graphs to determine which of these equations may be identities.
a. cosx = xin(π/2 - x)
b. cos x = sin (x - π/2)
c. (csc x - cot x)(sec x + 1) = 1
d. tan x (cot x + tan x) = sec2x

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