SSC CHSL 2024 PYQ — Question 72

SSC CHSL - 09 July 2024 - Shift 3 • Quantitative Aptitude • Q72

If sinθ = 725\frac{7}{25}, then cosθ and tanθ are respectively _______. (where θ is in the first quadrant)

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Correct answer: D

Explanation

The correct answer is option 4 i.e. 2425\frac{24}{25} and 724\frac{7}{24}.

sinθ = 7/25

θ is in the first quadrant (where all trigonometric functions are positive)

We can use the Pythagorean identity: sin²θ + cos²θ = 1

Substitute the given value of sinθ: (7/25)² + cos²θ = 1

⇒ 49/625 + cos²θ = 1

⇒ cos²θ = 1 - 49/625

⇒ cos²θ = 576/625

⇒ cosθ = √(576/625)

⇒ cosθ = 24/25

⇒ tanθ = sinθ / cosθ

⇒ Substitute the values of sinθ and cosθ: tanθ = (7/25) / (24/25)

⇒ tanθ = 7/24

Therefore, cosθ = 24/25 and tanθ = 7/24.