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Science Mode

In this mode the left column of buttons is allocated to trigonometric functions:

ButtonsFunction
HypEnter Hyperbolic sub mode. Hyp Sin for example is the hyperbolic sine: sinh
SinCompute the sine
Shift SinCompute the inverse sine
CosCompute the cosine
Shift CosCompute the inverse cosine
TanCompute the tangent
Shift TanCompute the inverse tangent
LogCompute the Log base 10
Shift LogCompute 10 to the power of x
LnCompute the natural logarithm. That is the log to base e
Shift LnCompute e to the power of x