CBSE Class 10 Maths (Basic) 2025 · Paper 430/3/1 · Question 19

Introduction to Trigonometry 1 mark Medium

Direction: In the following question, an Assertion (A) and a Reason (R) are given. Choose the correct option. Assertion (A) : For

sin θ = 1

cos θ

must be

0

. Reason (R) :

sin^{2} θ - cos^{2} θ = 1.

Assertion (A): For $sin θ = 1$ , $cos θ$ must be $0$ .

Reason (R): $sin^{2} θ - cos^{2} θ = 1.$

(a)Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(b)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
(c)Assertion (A) is true, but Reason (R) is false.
(d)Assertion (A) is false, but Reason (R) is true.

Answer

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