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If a1,a2,…………..an are in AP with common ...

If `a_1,a_2,…………..a_n` are in AP with common difference `d ne 0`then
find `(sin d) [sec a_1 sec a_2+ sec a_2 sec a_3+…….+sec a_(n-1) sec a_n]`

A

`cot a_n- cot a_1`

B

`cot a_1-cot a_n`

C

`tan a_n- tan a_1`

D

`tan a_n- tan a_(n-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
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