How do I solve trigonometric equations with Mathcad 15?

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@ptc-4127093 wrote:

Hello,

I would like to be able to solve trigonometric equations with Mathcad 15, but I can't.

Example:

What is x if cos(x) ≤ 1/2?

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What you show is not an equation but rather an inequation 😉

Mathcad 15 can happily solve the equation and you may use the "assume" modifier to limit the result to a certain range

but MC15 fails at the inequation. Adding "assume" constraints doe not help. The error message is "No solution found".

We would expect something like 

but Mathcads symbolic engine seems not to be capable enough to come up with this answer.

This does not mean that Mathcad can't solve inequations at all, simply that yours look to be too tough for Mathcad.

BTW, Wolfram Alpha does a better job: