If 2sec(2alpha)=tan (beta) + cot(beta), then one of the values of (alpha + beta ), is a) π b) nπ - π/4,n€Z c) π/4 d) π/2
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2sec(2α) = tan(β) + cot(β), then one of the values of (α+β), is π/4
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ans:(a)
Explain 19,20,21
F(x)=cisπ/x increas in
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