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Question : 106 of 160
Marks:
+1,
-0
Solution:
‌cos−1(−‌)−2sin‌−1(‌)+3cos−1(−‌)‌=π−cos−1(‌)−2(‌)+3(π−tan−1(−1).‌=cos−1(‌))‌=π−‌−‌+3(π−‌)+4⋅‌(1)‌=‌+3⋅‌+π‌=‌
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