Trigonometric Ratios of Standard Angles

Trigonometric Ratios of Standard Angles Class 9 ICSE ML Aggarwal img 23

Answer :

Trigonometric Ratios of Standard Angles Class 9 ICSE ML Aggarwal img 25

cos (90° – θ) = sin θ, tan (90° – θ) = cot θ and tan θ cot θ = 1

= 1/1

= 1

= RHS

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