If sinθ = , 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. and .
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.