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Why is it that sin^2(x) + cos^2(x) = 1?

Let's start with the definition of sin( x ) and cos( x ). We're going to use t rather than x here to avoid confusion, but the idea is exactly the same. Take a unit circle - that is, a circle with centre (0,0...
JT
Answered by John T. • Maths tutor
7547 Views

Prove that 0.565656.... can be expressed as 56/99.

1) Let x=0.565656... 2) Thus 100x=56.565656... 3) Subtracting equation 1) from 2) gives: 99x=56 4) Rearrange for x: x=56/99, Also x=0.565656... from 1) Therefore 0.565656...=56/99
DC
Answered by Daanyaal C. • Maths tutor
4643 Views

How can I move up in my AO2 bands in my History EPQ (AQA)?

Hi there! Your AO2 bands are about how you use evidence in relation to your argument. These are just a few tips about how you can improve. AO2 - 7-10 marks "Evidence of detailed research involving the s...
SD
12072 Views

How do you use the gerund in Latin?

The use of the gerund can be one of the most confusing aspects of Latin grammar. However, its use can be distilled into a relatively simple explanation. What is the gerund? Gramatically speaking, the gerund ...
TP
Answered by Toby P. • Latin tutor
11272 Views

How do you form the imperfect subjunctive?

Take the 3rd plural form (the "they" form) of a verb in the preterite tense. Take off the "ron" from the end of the verb, then add the relevant subjenctive ending, either:ra (I), ras (you...
IS
Answered by Isabella S. • Spanish tutor
3358 Views