Question

let us determine the value of tan from the relation 5sinsquare +4cos square=9divided by two

Answer 1

write it as sinsquare+4sinsquare+ 4 cossquare then take 4 common & then use sinsquare + cossquare =1 & then take 4on opposite side & find the angle which will come π/4 hence tanπ/4 = 1 is ur ans