Which expressions are equivalent to cos2(105°) – sin2(105°)? Check all that apply.1 – 2sin2(105°)2cos2(105°) – 12sin(105°) cos(105°)cos(105°)cos(210°)

Question

Revolt · Accepted Answer

1 – 2sin2(105°); 2cos2(105°) – 1; cos(210°)

Trigonometric Half Angle Identities

Which expressions are equivalent to cos2(105°) – sin2(105°)? Check all that apply.1 – 2sin2(105°)2cos2(105°) – 12sin(105°) cos(105°)cos(105°)cos(210°)

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