Which of the following option makes the . . .

Question : Which of the following option makes the statement below true?

a) -cosecx tanx
b) -secx tanx

c) -cosecx cotx
d) -secx cotx 

Doubt by Saumya 

Solution :

[∵1+tan²θ = sec²θ]

[∵a²-b² = (a+b)(a-b)]

[∵ 1-cos²θ = sin²θ]

Hence, c) would be the correct option.