Type "Debug" to see Debug. To close Debug, press "d" Type "{Up Arrow}" to open Settings. To close settings, press "{Down Arrow}" 1 to hear Sine (sin) 2 to hear Cosine (cos) 3 to hear Tangent (tan) 4 to hear Logarithm (log) 5 to hear Inverse Sine (-sin) 6 to hear Inverse Cosine (-cos) 7 to hear Inverse Tangent (-tan) 8 to hear Inverse Logarithm (-log)
