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RD Chapter 6 Trigonometric Identities Ex 6.1 Solutions

Question - 11 : -

Answer - 11 : -


Question - 12 : -

Answer - 12 : -


Question - 13 : -

Answer - 13 : -


Question - 14 : -

Answer - 14 : -


Question - 15 : -

Answer - 15 : -


Question - 16 : - tan2θ – sin2θ = tan2θ sin2θ

Answer - 16 : -


Question - 17 : - (sec θ + cos θ ) (sec θ – cos θ ) = tan2  θ+ sin2 θ

Answer - 17 : -


Question - 18 : - (cosec θ + sin θ) (cosec θ – sin θ) = cot2 θ+ cos2 θ

Answer - 18 : -


Question - 19 : - sec A (1 – sin A) (sec A + tan A) = 1(C.B.S.E. 1993)

Answer - 19 : -


Question - 20 : - (cosec A – sin A) (sec A – cos A) (tan A + cot A) = 1

Answer - 20 : -


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