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How do I get arctan MATH function in iphone SDK?
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Swipe up from the bottom bezel onto the screen to bring up Control Center. Tap the Calculator button on the bottom, second from right. Fun fact: You can also firmly press (3D Touch, iPhone 6s or later) on the Calculator icon if you'd like to copy your last calculation from the app.
Add Parentheses on the iPhone Calculator Using parentheses can be a little tricky at first, as it may seem like nothing is happening when you are pressing the parentheses buttons. The calculator will also display the subtotal of the operations inside the parentheses after you press the closing parenthesis button.
To enter scientific calculator mode, rotate your iPhone 90 degrees until it is in landscape orientation. The Calculator app will automatically adjust to fit the wide orientation of the screen, and new scientific calculator buttons will be added to the display.
Definition and Usage. The math. atan() method returns the arc tangent of a number (x) as a numeric value between -PI/2 and PI/2 radians. Arc tangent is also defined as an inverse tangent function of x, where x is the value of the arc tangent is to be calculated.
The function you are looking for is atan(double)
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