(A) Evaluate {5 \cos ^2 60^{\circ}+4 \sec ^2 30^{\circ}-\tan ^2 45^{\circ}}/{ \sin ^2 30^{\circ}+\cos ^2 30^{\circ}} OR (B) If {\A} and {\B} are acute angles such that \sin ( {\A}- {\B})=0 and 2 \cos ( {\A}+ {\B})-1=0, then find angles {\A} and {\B}.

CBSE Class 10 Math 2023 Delhi Set-1 Solved Paper

Question : 25

Total: 38

(A) Evaluate ‌

5cos260∘+4 sec230∘−tan245∘

sin‌230∘+cos230∘

OR
(B) If A and B are acute angles such that sin‌(A−B)=0 and 2‌cos(A+B)−1=0, then find angles A and B.

Solution: 👈: Video Solution

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