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(If cosA/2=1/2. find the value of sinA.)​
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(If cosA/2=1/2. find the value of sinA.)​

User Matt Privman
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\\ \rm\hookrightarrow cosA/2=1/2


\\ \rm\hookrightarrow 2cosA=2


\\ \rm\hookrightarrow cosA=1

Now


\\ \rm\hookrightarrow sinA=√(1-cos^2A)


\\ \rm\hookrightarrow sinA=√(1-1^2)


\\ \rm\hookrightarrow sinA=0

Here

  • A=0°
User Sheinbergon
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