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Prove that (2sqrt3 + 3) sinx +2sqrt3 co...

Prove that `(2sqrt3 + 3) sinx +2sqrt3 cos x` lies between `-(2sqrt3 +sqrt15) and (2sqrt3+ sqrt15)`,

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RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS OF COMPOUND ANGLES-All Questions
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  3. Prove that (2sqrt3 + 3) sinx +2sqrt3 cos x lies between -(2sqrt3 +sq...

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  4. Prove that: ("sin"(x+theta))/("sin"(x+phi))=cos(theta-phi)+cot(x+phi)s...

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