Solve: (cos2 theta – 1)/sin2 theta

is equal to
(a) 1
(b) -1
(c) sin² θ
(d) sec² θ

Solution:

=

(sec² θ – 1) (1 – cosec² θ) is equal to
(a) – 1
(b) 1
(c) 0
(d) 2

Solution:

(sec² θ – 1) (1 – cosec² θ)
=

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