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Question
In a ΔAВС, ∠C = 90°. Then, the value of cos (A + B) is ______.
Options
0
1
`1/2`
`3/5`
MCQ
Fill in the Blanks
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Solution
In a ΔAВС, ∠C = 90°. Then, the value of cos (A + B) is 0.
Explanation:
Clearly, A + B = 90°.
So, cos (A + B) = cos 90° = 0.
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