state gov UPPCL Assistant Accountant 2022 - 23 Mock Test Quantitative Aptitude Trigonometry Circular Measure of Angles
sin72° = a/b, then find the value of cos72° + sin18°.
1
\(\frac{{\sqrt {{b^2} - {a^2}} }}{b}\)
2
\(\frac{{\sqrt {{a^2} - {b^2}} }}{a}\)
3
\(\frac{{2\sqrt {{b^2} - {a^2}\;} }}{b}\)
4
2 (b/a)