How to solve trignometric equation?

Hi all

Could someone please let me know how to solve this equation?

tan19 = 2*cot(x)[(9*sin(x)^2 - 1)/((9*(1.4 + cos(x)^2) + 2)]

Thank you

[Jan]

NUmerically? Symbolically? With pencil and paper?

Please be so kind and type is at least as Matlab code. Is "1 * 4" really useful?

[Star Strider]

There are likely an infinity of solutions —

syms x 
figure
fplot(tand(19) - 2*cotd(x)*(9*sind(x)^2-1)/(9*(1.4*cosd(x)^2)+2), [-3600 3600])
grid
xlabel('x°')
ylabel('f(x)')

.

Answer 1

[Mudit Chaturvedi]

Hi!

I understand you are trying to solve a trignometric equation.

You can use the solve function, in particular you need to check the section about solving an equation in a variable 'x' for the variable itself.

sol = solve(eqn,x) %where x is the variable and eqn is the equation (ax = b) written as a*x == b

Please refer to this Matlab Answers link for more information.