Teaching UP TGT Mock Test Series 2025 Mathematics Trigonometry Trigonometric Identities

If sin θ + cos θ = m and sec θ + cosec θ = n, then find the value of n(m + 1)(m - 1).

1
n(m - 1)(m - 1) = 2m
2
n(m + 1)(m - 1) = 2m
3
n(m + 1)(m - 1) = m
4
n(m + 1)(m + 1) = 2m
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