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  • Provide Solution For R.D. Sharma Maths Class 12 Chapter 28 The Plane Exercise 28.13 Question 10 Sub Question 2 Maths Textbook Solution.

Provide Solution For  R.D. Sharma Maths Class 12 Chapter 28 The Plane Exercise 28.13 Question 10 Sub Question 2 Maths Textbook Solution.

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\mathrm{L}=3, \mathrm{~m}=4, \mathrm{n}=2, \mathrm{a}=1, \mathrm{~b}=-1 and \; \mathrm{c}=1

                \begin{aligned} &\sin \theta=\frac{1 \times 3+(-1) \times 4+1 \times 2}{\sqrt{\left(1^{2}+(-1)^{2}+1^{2}\right)} \sqrt{3^{2}+4^{2}+2^{2}}} \\ &\sin \theta=\frac{1}{\sqrt{3} \sqrt{29}} \\ &\theta=\sin ^{-1} \frac{1}{9.32} \end{aligned}

Mention sin inverse 1/87

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