Question

Which of the following accesses the tenth element stored in array:
(a) array [10];
(b) array;
(c) array(9);
(d) array(10);​

Answer 1

Answer:

i hope it helps

Explanation:

LHS=

secA−1

1

+

secA+1

1

=

cosA

1

−1

1

+

cosA

1

+1

1

=

1−cosA

cosA

+

1+cosA

cosA

=cosA(

1−cos

2

A

1+cosA+1−cosA

)

=2cosA×

sin

2

A

1

=2×

sinA

cosA

×

sinA

1

=2cotAcosecA