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ML Aggarwal Solutions Class 10 Mathematics Solutions for Trigonometric Identities Exercise 18 in Chapter 18 - Trigonometric Identities
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tan A + cot A = sec A cosec A
Answer:
Solution:
Firstly we can convert tan A and cot A in terms of sin A and cos A in LHS.
L.H.S. = tan A + cot A
= sin A/cos A + cos A/sin A
= (sin2 A + cos2 A)/ (sin A cos A)
= 1/ (sin A cos A)
= sec A cosec A
= R.H.S
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