Question

Prove that (cosec ^ 2 30 -1) tan°2?
a) 1
b) 2
C) 3
d) 4​

Answer 1

Answer:

Here you use identity =(cosec^2x - 1= cot^2x)

Then it will solved

Answer 2

Answer:

Now,

(cosecA−cotA)

2

=(

sinA

1

−

sinA

cosA

)

2

=

sin

2

A

(1−cosA)

2

=

1−cos

2

A

(1−cosA)

2

[ Since sin

2

A=1−cos

2

A]

=

(1+cosA)

(1−cosA)

.

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