(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

(i) Express 3cosx+3sinx in the form Rcos(x-a) where R>0 and 0<a<(1/2)∏

(ii) The expression T(x) is definded by T(x)=8/(3cosx+3sinx)

(a) Determine a value of x for which T(x) is not defined

(b) Find the smallest positive value of x satisfying T(3x)=(8/9)√6 giving your answer in exact form.

3. The attempt at a solution

for (i) 3√2cos(x-(1/4)∏)

(a) 8/(3√2cos(x-(1/4)∏)). Could someone explain how to do (a) and (b) please in terms I can understand easy. Thanks.

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# Homework Help: Express 3cosx+3sinx in the form Rcos(x-a)

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