Assertion (A): In a right angle triangle ...

CBSE Class 10 Basic Math 2025 All Sets Solved Paper

Question : 19 of 20

Marks: +1, -0

Assertion (A): In a right angle triangle ABC,

\angle B = 90^{\circ}

Therefore the value of cos(A + C) is equal to 0.

Reason (R):

A + B + C = 180^{\circ}

and

\cos 90^{\circ} = 0

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

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