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What is the indefinite integral of cos^2x?

List Trigonmetric identities which could help to simpilfy integral

Use cos(2x)= Cos²x-sin²x and sin²x=1-cos²x

Sub identity 2 into 1 and rearrange ...

Answered by Jake M. • Maths tutor

3054 Views

Solve 3x^2 + 6x – 2 = 0 Give your solutions correct to 2 decimal places.

3x²+ 6x - 2 = 0 When we have a polynomial with powers of x up to 2 (a quadratic equation) we can apply the quadratic formula : -b ± root(b²-4ac)/2a where your equation is in the for...

Answered by Maya S. • Maths tutor

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Given y = x^3 + 4x + 1, find the value of dy/dx when x=3

To differentiate this equation, you must bring the power of each x term down to the front and reduce the power of x by 1, with constants disappearing:

dy/dx = 3x^3-1 + (41)*x

Answered by Florence H. • Maths tutor

9644 Views

(a) show that 3/10 + 2/15 = 13/30 (b) show that 2 5/8 ÷ 1 1/6 = 2 1/4

(a) In order to add or subtract any fractions, they must first have a common denominator. For this example, I will take this to be 30. Looking at 3/10: in order to change the denomintor to 30, we must mul...

Answered by Florence H. • Maths tutor

6021 Views

How do one tailed and two tailed hypothesis tests differ

A one tailed test is when you are testing specifically for an increase or decrease- eg whether the probability of a person buying a product has INCREASED after a marketing change

A two tailed test ...

Answered by Katie G. • Maths tutor

3960 Views