Vikas TU
Last Activity: 8 Years ago
Write siny = sinx/3 and squaring both sides,
(siny)^2 = (sinx)^2/9..............(1)
(cosy)^2 = 4(cosx)^2........(2)
add both of them,
and equate it to 1.
and solve in sinx or cosx in any of them by writing cosx = 1 – sin^2x or vice versa.
get x values and then simply y values. and then u can find the final value.