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Chapter 3: Problem 21

The _______ library function returns the tangent of an angle.

Short Answer

Expert verified
Answer: In C/C++ programming languages, the 'tan()' function from the `` (C++) or `` (C) library is used. In Python, the 'math.tan()' function from the 'math' library is used to find the value of the tangent of an angle.

Step by step solution

01

Identifying Trigonometric Functions

To understand the tangent function, we must first know about basic trigonometry. There are three primary trigonometric functions: sine, cosine, and tangent. Each of these functions describes the relationship between the sides of a right-angled triangle having an angle θ. The tangent function is defined as the ratio of the side opposite to the angle θ to the side adjacent to the angle θ. Now that we know this information, let's understand which programming libraries help us to find the value of the tangent function.
02

C/C++ Library Function for Tangent

In C and C++ programming languages, we can use the 'tan()' function from the `` (C++) or `` (C) library to find the value of the tangent of an angle, which is specified in radians. For example, to find the tangent of an angle (in radians): ```c++ #include #include int main() { double angle = M_PI / 4; // Angle in radians double result = tan(angle); std::cout << "The tangent of the angle is: " << result << std::endl; return 0; } ```
03

Python Library Function for Tangent

In Python, we can use the 'math.tan()' function from the 'math' library to find the value of the tangent of an angle, which is specified in radians. For example, to find the tangent of an angle (in radians): ```python import math angle = math.pi / 4 # Angle in radians result = math.tan(angle) print("The tangent of the angle is:", result) ``` In conclusion, the library function used to return the tangent of an angle depends on the programming language being used. In C/C++, it would be the 'tan()' function, and in Python, it would be the 'math.tan()' function.

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Most popular questions from this chapter

Each of the following programs has some errors. Locate as many as you can. using namespace std; int main () { double number1, number2, sum; Cout << "Enter a number: "; Cin << number1; Cout << "Enter another number: "; Cin << number2; number1 + number2 = sum; Cout "The sum of the two numbers is " << sum return 0; }

The __________ library function returns the natural logarithm of a number.

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include using namespace std; int main() { long x, y, z; x = y = z = 4; x += 2; y -= 1; z *= 3; cout << x << " " << y << " " << z << endl; return 0; } # . #include using namespace std; int main() { long x, y, z; x = y = z = 4; x += 2; y -= 1; z *= 3; cout << x << " " << y << " " << z << endl; return 0; }
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