Use the Cofunction Theorem to fill in the blanks so each expression becomes a true statement 13 sin 10 cos 15 tan 8 cot 17 sec

Question

Use the Cofunction Theorem to fill in the blanks so each expression becomes a true statement 13 sin 10 cos 15 tan 8 cot 17 sec 73 csc 19 sin x cos 21 tan 90 x cot 14 cos 40 sin 16 cot 12 tan 18 csc 63 sec 20 sin y cos 22 tan 90 y cot

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