Question: Determine the sign (+ or ) that yields the correct formula for the following: (a) (b) (c) d -(sin x + cos x) = sin
Determine the sign (+ or −) that yields the correct formula for the following:

(a) (b) (c) d -(sin x + cos x) = sin x cos x dx d dx d dx sec x = sec x tan x cotx = csc x
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