How to simplify "sin(x)^2 + cos(x)^2" to 1 in calc?

[Vladimir Nikishkin]

Hello, everyone.

Please, refer me to a correct mailing list if this one is not
appropriate,

I am trying to make calc apply the most basic trigonometric identity,
and simplify the algebraic formula "sin(x)^2 + cos(x)^2" to 1.

I tried  'a v', 'a "', '=', 'j D', 'j M', but seemingly, all in vain,
even though "sin(x)^2 + cos(x)^2 = 1" seems to be one of the safest
substitutions in algebra. (Not sure about 'x having a quaternion value,
or working in some arithmetic mod p.)

What am I doing wrong?


-- 
Your sincerely,
Vladimir Nikishkin (MiEr, lockywolf)
(Laptop)