Top answers

Differentiate tan^2(x) with respect to x

d/dx(tan^2(x)) is not a known differential, and therefore requires a substitution to calculate it using simpler known differentials. Using the identity sin^2(x) + cos^2(x) = 1, the equation can be divided th...
HA
Answered by Harry A. • Maths tutor
22987 Views

By first proving that sin2θ=2sinθcosθ, calculate ∫1+sinθcosθ dθ.

We have, from the formula book, sin⁡(A±B)=sinAcosB±cosAsinB Using A=B=θ , we have sinθ+θ=sinθcosθ+cosθsinθ Which we can simplify to sin2θ=2sinθcosθ as required. We can then substitute this into the integral:...
AH
Answered by Abigail H. • Maths tutor
7703 Views

What is the difference between the function of a receptor and the function of an effector.

Receptors detect and sense changes in their surroundings, called stimuli, e.g. a light receptor. Effectors produce the response to the stimulus, e.g. a muscle.
CS
Answered by Claudia S. • Biology tutor
5482 Views

How do I answer a question asking me to describe and/or explain a graph?

These questions should be easy mark gainers as they don't usually require a lot of prior knowledge. However, many students find that they consistently lose all their marks on these questions. With many exam ...
KB
Answered by Kate B. • Biology tutor
21331 Views

Should I be watching French films with French subtitles or English subtitles?

I definitely recommed watching with subtitles in the target language. Even if you don't understand everything it is a really good way to recognise vocabulary and improve your accent for certain words.
HT
Answered by Holly T. • French tutor
4413 Views