What is the general solution for d=7.2sec(*sin(30-20)) ?

The general solution for d=7.2sec(*sin(30-20)) is d=7.2sec(sin(30-20))

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d=7.2sec(*sin(30-20))

d = 7.2 sec (\cdot sin (3 0^{\circ} - 2 0^{\circ}))

d = 7.2 sec (sin (3 0^{\circ} - 2 0^{\circ}))

Solution steps

d = 7.2 sec (sin (3 0^{\circ} - 2 0^{\circ}))

Could not simplify further

d = 7.2 sec (sin (3 0^{\circ} - 2 0^{\circ}))

\frac{a}{sin ( 4 4 ^{\circ} )} = \frac{9}{sin ( 6 6 ^{\circ} )}

c, sec (4 5^{\circ} + \frac{a}{2}) sec (4 5^{\circ} - \frac{a}{2}) = 2 sec (a)

cos^{2} (x) = 1 + cos^{2} (x)

c, sin^{3} (x) + sin (x) cos (x) + cos^{3} (x) = 1

t, tan (x) tan^{2} (x) = 1

What is the general solution for d=7.2sec(*sin(30-20)) ?
The general solution for d=7.2sec(*sin(30-20)) is d=7.2sec(sin(30-20))