(A) Evaluate {5 \cos ^2 60^{\circ}+4 \sec ^2 ...

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.

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