If (sec θ – tan θ)/ (sec θ + tan θ) = ¼, find sin θ.

If (sec θ – tan θ)/ (sec θ + tan θ) = ¼, find sin θ.

Answer :

Trigonometric Ratios Class 9 ICSE ML Aggarwal img 44

4 – 4 sin θ = 1 + sin θ

4 – 1 = sin θ + 4 sin θ

⇒ 3 = 5 sin θ

⇒ sin θ = 3/5

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