Top answers

Maths
A Level

How do you solve 3sin2AtanA=2 for 0<A<180?

The first step in solving any trigonometric equation is to convert everything into sine and cosine functions. So in this case we need to start by converting the tanA. We can use the identity: tanA=sinA...

SW
Answered by Sarah W. Maths tutor
5830 Views

Sketch the curve y = (x^2 - 9)(x - 2)

When it comes to curve sketching, there are a number of tests that you can do to find out crucial characteristics about the curve. They are following:

1. Setting x = 0 will give you the p...

DS
Answered by Dan S. Maths tutor
6541 Views

Given that 4(cosec x)^2 - (cot x)^2 = k, express sec x in terms of k.

This question makes good use of the trigonometric identities tan2x + 1 = sec2x and 1 + cot2x = cosec2x which can be ...

DS
Answered by Dan S. Maths tutor
12575 Views

Find the gradient of the line 4x+9y=10.

There are two approaches to this problem.

Firstly, you could rearrange the equation so that you have the general equation of a line, y=mx+c, where m is the gradient that you are looking f...

DS
Answered by Dan S. Maths tutor
4813 Views

Exponential Growth Equations

The number of bacteria on Agar plate A is given by the equation n=400(2^d), where d is equal to the number of cellular divisons each cell has undergone. If the cells divides ever...

JS
Answered by John S. Maths tutor
3791 Views

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