Show that cos (2a) = 2 cos a is not an identity by finding a replacement or replacements for which the sides of the equation do not name the same number. Then use a graphing calculator to show that the equation is not an identity. ... Select the correct choice below and fill in the answers boxes within your choice. (Type integers or decimals rounded to one decimal place as needed.) OA. The equation is not an identity because for a = 1.946, the fully-simplified form of the left side is OB. The equation is not an identity because for a = 0.785, the fully-simplified form of the left side is OC. The equation is not an identity because for a=-1.946, the fully-simplified form of the left side is and the fully-simplified form of the right side is and the fully-simplified form of the right side is and the fully-simplified form of the right side is

Show that cos (2a) = 2 cos a is not an identity by finding a replacement or replacements for which the sides of the equation do not name the same number. Then use a graphing calculator to show that the equation is not an identity. ... Select the correct choice below and fill in the answers boxes within your choice. (Type integers or decimals rounded to one decimal place as needed.) OA. The equation is not an identity because for a = 1.946, the fully-simplified form of the left side is OB. The equation is not an identity because for a = 0.785, the fully-simplified form of the left side is OC. The equation is not an identity because for a=-1.946, the fully-simplified form of the left side is and the fully-simplified form of the right side is and the fully-simplified form of the right side is and the fully-simplified form of the right side is

Trigonometry (MindTap Course List)

8th Edition

ISBN:9781305652224

Author:Charles P. McKeague, Mark D. Turner

Publisher:Charles P. McKeague, Mark D. Turner

Chapter5: Identities And Formulas

Section5.1: Proving Identities

Problem 79PS

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