The table shows the derivation of an alternate version of cos(2x). Select the correct reason for each step.

Question

Revolt · Accepted Answer

✔ Double angle identity; Reason 1 is .: Double angle identity; Reason 2 is .: Pythagorean identity; Reason 3 is .: Distributive property; Reason 4 is .: Simplifying

Trigonometric Double Angle Identities

The table shows the derivation of an alternate version of cos(2x). Select the correct reason for each step.

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