If = n, show that: (m² + n²) cos² B = n²

Question

KnowledgeBoat · Accepted Answer

To prove: (m² + n²) cos² B = n² Substituting value of m and n in L.H.S. of the above equation : By formula, ⇒ sin² B + cos² B = 1 Since, L.H.S. = R.H.S. Hence, proved that (m² + n²) cos² B = n².

Mathematics

If = n, show that: (m<sup>2</sup> + n<sup>2</sup>) cos<sup>2</sup> B = n<sup>2</sup>

Trigonometric Identities

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