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Write sin(4x) in terms of sin and cos.

4sinx(cosx)^3 - 4cosx(sinx)^3

Answered by Zyra A. • Further Mathematics tutor

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Describe how the antagonistic muscle pairs are working at the knee during the process of kicking a ball

As a person prepares to kick a ball, their hamstrings contract which causes their knee to bend/flex. Simultaneously, their quadriceps relax and lengthen. Here, the hamstring is the the agonist and the qua...

Answered by Ayesha W. • Physical Education tutor

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Find the equation of the tangent line to the graph of y=2x^4-7x^3+x^2+3x when x=5

y=-13x+12

Answered by Zyra A. • Maths tutor

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What is the difference between an etic and emic approach? What's an imposed etic?

The etic and emic approaches in psychology are used to understand cultural bias in the study of human behaviour. The distinction between the two was proposed by John Berry in 1969. An etic approach looks ...

Answered by Matilda H. • Psychology tutor

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