alleryStart learning →The value of sin 105° + cos 105° is
A0
B1/√2
C1
D√2
Answer & Solution
Correct answer: B. 1/√2
cos105° = −sin15° and sin105° = cos15°; here sin105° + cos105° = cos15° − sin15° = √2 sin30°, which is 1/√2, so the answer is 1/√2.
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