Question

if sinA=1/2find the value of COSA.​

Answer 1

√3/2 is the correct answer.......

Answer 2

$sinA \: = \frac{1}{2} \\ \\ cosA \: = ? \\ \\ = > cosA = \sqrt{1 - sin {}^{2}A} \\ \\ = \sqrt{ 1 - ( \frac{1}{2}) {}^{2} } \\ \\ = \sqrt{1 - \frac{1}{4} } \\ \\ = \sqrt{ \frac{4 - 1}{4} } \\ \\ = \sqrt{ \frac{3}{4} } \\ \\ = \frac{ \sqrt{3} }{2}$

I hope this helps.