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Calculator
You can use the Calculator to perform simple and advanced calculations.
From a Home screen or Application menu, tap Calculator icon
Tap on the numbers and mathematical operators present on the screen to perform simple calculations.
Press the Menu key/tap
cos, tan, log, etc.
To clear calculation histories, tap
Press Menu key/tap
AppInstaller
Manage applications. Install and uninstall application.
From a Home screen or Application menu, tap AppInstaller icon
Select an application source, device source, memory card, or SD card, and then add it to the list of applications.
Then select Install or Cancel.
Alternately, in the application list interface, tap on the application, then the tap the
Install/Uninstall: To install or uninstall the selected application program.
Select all: Select all applications.
Unselect all: Deselect all.
to pop up a menu bar featuring the Advanced Panel, to access operators such as sin,
icon again.
to exit and return to previous screen.
to enter the calculator application.
to enter AppInstaller application.
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icon for a pop-up menu：
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