Published by:
CGP EDU Academic Team
Published on: August 13, 2026
(i) Find the no. of solution of equation 2 cos x = x in [0, π ].
(ii) Find max and min value of 4 cos 2x – 3 sin 2x + 10.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
Sol. (i) 2 cos x = x
cos x = 
y = cos x and y = 
(ii) – 5 ≤ 4 cos 2x – 3sin 2x ≤ 5
– 5 + 10 ≤ 4 cos 2x – 3 sin 2x + 10 ≤ 5 + 10
max = 15 ⇒ min = 5
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