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Aptitude · Q236

Trigonometry

Competitive Exams · Aptitude · question 236

Q236

(sinθ + cosecθ)2 + (cosθ + secθ)2 - 1 = . . . . . . . .

A.
6 + tan2θ + cot2θ
Answer
B.
tan2θ - cot2θ
C.
sin2θ - cot2θ
D.
6 - sin2θ + cos2θ

Answer: Option A

Solution

Answer: Option A
Solution:
(sinθ + cosecθ)2 + (cosθ + secθ)2 - 1
= sin2θ + cosec2θ + 2 + cos2θ + sec2θ + 2 - 1
= (sin2θ + cos2θ) + 1 + cot2θ + 2 + 1 + tan2θ + 2 - 1
= 6 + tan2θ + cot2θ