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Class 12 Continuity And Differentiability · Assertion Reason1 Marksassertion_reason

Class 12 Maths · Continuity And Differentiability · Assertion Reason #31

Assertion: For f(x)=arcsin x+arccos x+2, f′(0)=0. Reason: The derivative of sin x is cos x.

✅ Step-by-Step Solution

Final Answer: Option (B): Both A and R are true, but R does not correctly explain A.
  1. On (−1,1), f is the constant π/2+2, so its derivative is zero. The sine derivative statement is true but does not explain the constant-sum identity.

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