N2004 P1 Q1

N2004 P1 Q1

3 marks
Past Year National Exams
Free

The equation

\(x\sin x+\cos x=1.015\)

has a positive root \(\alpha \) close to zero. Use small-angle approximations for \(\sin x\) and \(\cos x\) to obtain an approximation to \(\alpha \). Give your answer correct to \(3\) significant figures.[3]

Video Solution:

Default solution

Timothy Gan
Answer:\(\alpha = 0.174\) (\(3\) s.f.)

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