Math

What is the solution to the equation 2x + 5 = 15?To solve the equation 2x + 5 = 15, first subtract 5 from both sides to get 2x = 10. Then, divide both sides by 2 to find x = 5. Thus, the solution to the equation is x = 5.

How do you find the derivative of a composite function using the chain rule?To find the derivative of a composite function using the chain rule, you differentiate the outer function with respect to the inner function and then multiply by the derivative of the inner function. Mathematically, if y = f(g(x)), then dy/dx = f'(g(x)) * g'(x). This method allows you to handle complex functions systematically.

How can the distributive property be used to simplify large multiplications in pre-algebra?The distributive property allows you to break down large multiplications into smaller, more manageable parts. For example, to multiply 27 by 15, you can use the distributive property: 27 * 15 = 27 * (10 + 5) = (27 * 10) + (27 * 5). This simplifies the calculation to 270 + 135 = 405.

How do you find the derivative of a function using the power rule, and can you provide an example?The power rule states that if you have a function of the form f(x) = x^n, the derivative f'(x) = n*x^(n-1). For example, if f(x) = x^3, then f'(x) = 3*x^2.

If f(x) = 2x^2 – 3x + 5, find the value of x when f(x) equals 12.To find the value of x when f(x) = 12, solve the equation 2x^2 – 3x + 5 = 12. Simplifying, we get 2x^2 – 3x – 7 = 0. Using the quadratic formula, x = (3 ± √(9 + 56))/4, yielding x = 2 or x = -7/2.

How do you derive the double angle formulas for sine, cosine, and tangent and apply them to solve complex trigonometric equations?To derive the double angle formulas for sine, cosine, and tangent, use the identities sin(2θ) = 2sin(θ)cos(θ), cos(2θ) = cos²(θ) – sin²(θ), and tan(2θ) = 2tan(θ)/(1-tan²(θ)). Apply these formulas by substituting them into trigonometric equations to simplify and solve for unknown angles.

How do you find the sine, cosine, and tangent of an angle in a right triangle using the Pythagorean Theorem?To find the sine, cosine, and tangent of an angle in a right triangle using the Pythagorean Theorem, first identify the lengths of the sides: opposite (a), adjacent (b), and hypotenuse (c). The Pythagorean Theorem states that a² + b² = c². Then, sine is a/c, cosine is b/c, and tangent is a/b.

Can you explain how to use the sum and difference formulas for sine, cosine, and tangent to solve complex trigonometric expressions?The sum and difference formulas for sine, cosine, and tangent are vital tools in trigonometry. They allow us to simplify complex expressions by breaking them into manageable parts. For sine: sin(a ± b) = sin(a)cos(b) ± cos(a)sin(b). For cosine: cos(a ± b) = cos(a)cos(b) ∓ sin(a)sin(b). For tangent: tan(a ± b) = (tan(a) ± tan(b)) / (1 ∓ tan(a)tan(b)). These formulas are particularly useful in solving equations, proving identities, and evaluating trigonometric functions at specific angles.

How do you find the angle of a right triangle using inverse trigonometric functions given the lengths of two sides?To find an angle in a right triangle using inverse trigonometric functions, use the ratios of the side lengths. For angle θ, if you know the opposite side (a) and the adjacent side (b), use θ = arctan(a/b). If you know the hypotenuse (c) and the opposite side (a), use θ = arcsin(a/c). For the hypotenuse (c) and the adjacent side (b), use θ = arccos(b/c).

How do you simplify the expression with both multi-step operations and fraction coefficients: 2/3x – 5/6 = 1/2( x + 10 )?To simplify the expression 2/3x – 5/6 = 1/2(x + 10), first distribute the 1/2 on the right side: 2/3x – 5/6 = 1/2x + 5. Then, to eliminate the fractions, multiply every term by 6: 4x – 5 = 3x + 30. Finally, solve for x by isolating it: x = 35.