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Prove: \[\left( \mathbf{1}\text{ }+\text{ }\mathbf{ta}{{\mathbf{n}}^{\mathbf{2}}}~\mathbf{A} \right)\text{ }\mathbf{cot}\text{ }\mathbf{A}/\text{ }\mathbf{cose}{{\mathbf{c}}^{\mathbf{2}~}}\mathbf{A}\text{ }=\text{ }\mathbf{tan}\text{ }\mathbf{A}\]
Prove: \[\left( \mathbf{1}\text{ }+\text{ }\mathbf{ta}{{\mathbf{n}}^{\mathbf{2}}}~\mathbf{A} \right)\text{ }\mathbf{cot}\text{ }\mathbf{A}/\text{ }\mathbf{cose}{{\mathbf{c}}^{\mathbf{2}~}}\mathbf{A}\text{ }=\text{ }\mathbf{tan}\text{ }\mathbf{A}\]
Class 10 | Exercise 21A | ICSE | Selina | Trigonometrical Identities
Prove: \[\left( \mathbf{1}\text{ }+\text{ }\mathbf{ta}{{\mathbf{n}}^{\mathbf{2}}}~\mathbf{A} \right)\text{ }\mathbf{cot}\text{ }\mathbf{A}/\text{ }\mathbf{cose}{{\mathbf{c}}^{\mathbf{2}~}}\mathbf{A}\text{ }=\text{ }\mathbf{tan}\text{ }\mathbf{A}\]

Selina Solutions Concise Class 10 Maths Chapter 21 ex. 21(A) - 8

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