NZ Level 8 (NZC) Level 3 (NCEA) [In development]
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Expand expressions using angle sum and difference identities

Interactive practice questions

Expand $\tan\left(\theta-x\right)$tan(θx).

Easy
Approx a minute
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Expand $\sin\left(3x-y\right)$sin(3xy), rewriting it in terms of angles $3x$3x and $y$y.

Consider the following.

Expand $\cos\left(2x+3y\right)$cos(2x+3y), rewriting it in terms of angles $2x$2x and $3y$3y.

Outcomes

M8-6

Manipulate trigonometric expressions

91575

Apply trigonometric methods in solving problems

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