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(Solved): If cosA=0.4, then which of the following is true? sec(2A)=0.4 sinA=0.6 sin(90A)=0.4 c ...




If \( \cos A=0.4 \), then which of the following is true?
\[
\sec \left(\frac{\pi}{2}-A\right)=0.4
\]
\( \sin A=0.6 \)
\( \si
If , then which of the following is true?


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Here given that: cos?A=0.4 So
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