Question

(sinA+ secA)^2+(cosA + cosecA)^2 = (1+secA cosecA)^2,​

Answer 1

$\huge\bigstar\underline\mathfrak\blue{Explanation}$

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$\huge\bigstar\underline\mathfrak\blue{Formulae\:used}$

• Sin²∅+cos²∅ = 1
• 1/sin∅ = cosec∅
• 1/cos∅ = sec∅
• (a+b)² = a²+b²+2ab