Question

find the dimension of a
$\sqrt{x}$
+
${bt}^{2}$


​

Answer 1

Answer:

If A+B+C=270∘ , then cos2A+cos2B+cos2 C+4sinAsinBsinC= 216.7 K LIKES ... In a `triangleABC` prove that `cos2A+cos2B+cos 2C=-. play. 5:05.