Single Answer MCQ
Q-00051701
Evaluate cos(105°) using sum of angles.
1
−√3/2
2
−√2/2
3
√2/2
4
−√6/4 − √2/4
Answer and Solution
Answer
D. −√6/4 − √2/4
Solution:
cos(105°) = cos(90° + 15°) = -sin(15°) = −(√6/4 + √2/4).
Watch Video Solution
Keep Practising
Students who asked this also explored
Continue with nearby questions to strengthen the same chapter concept while you still have the context fresh in mind.