Question
If cos θ + sin θ = m, sec θ + cosec θ = n then n(m
2 – 1) is equal to?Solution
Put θ = 45°, then m = 1/√2 + 1/√2
⇒m = √2 and n = 2√2=2m
So, n(m 2 –1) = 2m(m 2 –1) = 2m(2 – 1) = 2m
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