JEE MATHEMATICS MCQ: TRIGONOMETRY RATIOS

1 Hard

1 of 1

Application +4 | -1

A watch which gains 5 seconds in 3 minutes was set right at

7 \mathrm{am}

. In the afternoon of the same day, when the watch indicated quarter past 4 o'clock, the true time was

View answer and explanation

Correct option: B

14 \cdot \frac{22}{37} \min

to 4

Option B (

14 \frac{22}{37}

min to 4) is correct because it calculates the true time by accounting for the watch's gain over the period from 7 am to 4:15 pm.

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\tan \alpha=\frac{p}{q}

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\alpha

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\triangle A B C

C

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\sin ^2 \frac{A}{2}+\sin ^2 \frac{B}{2}+\sin ^2 \frac{C}{2}=

\sin ^2(A / 2)+\sin ^2(B / 2)-\sin ^2(C / 2)=