Question

Assertion :In a right angled triangle, $\sin {47}^o=\cos {43}^o$ Reason: $\sin \theta =\cos (90+\theta )$, where $\theta$ is an angle in the right angled triangle.

• A. If both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. If both Assertion and Reason are correct ,but Reason is not the correct explanation for Assertion
• C. If Assertion is correct but Reason is incorrect
• D. If Assertion is incorrect but Reason is correct

Answer 1

The correct option is C If Assertion is correct but Reason is incorrect

Assertion is true, but reason is not correct.
$\sin \theta =\cos ({90}^o-\theta )$
$\sin {47}^o=\cos ({90}^o-{47}^o)=\cos {43}^o$