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Write solutions that justify each transformation step
Worksheet
Grade Level
Trigonometry
TRIG.144 Write solutions that justify each transformation step
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🔴 Hard
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Which reasoning best justifies Line 1 → Line 2?
A
Use identities sin²(θ)+cos²(θ)=1 and sin(2θ)=2sin(θ)cos(θ)
B
Create a common denominator and combine the terms
C
Distributive property: a(b+c)=ab+ac
D
Periodicity: sin(θ+2π)=sin(θ), cos(θ+2π)=cos(θ), tan(θ+π)=tan(θ)
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