tanA + cotA = কত?

প্রশ্ন: tanA + cotA = কত?

সমাধান:
tanA + cotA
= (sinA/cosA) + (cosA/sinA)
= (sin²A + cos²A)/cosA.sinA
= 1/cosA.sinA
= (1/cosA)(1/sinA)
= secA.cosecA