(cosx)^3 -(cosx)(sinx) -(sinx)^3=1
value of x=?
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Step-by-step explanation:
Solution

sinx3−1+cosx3+1=42
Divide both sides by 22
22sinx3−1+22cosx3+1=2
Multiply both sides by sinxcosx
223−1cosx+223+1sinx=2sinxcosx
⇒sin15∘cosx+cos15∘sinx=sin2x since
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