JEE MATHEMATICS MCQ: TRIGONOMETRY RATIOS

1 Easy

1 of 1

Application +4 | -1

For

x \in IR,\,\,3\cos \,\,\left( {4x - 5} \right) + 4

lies in the interval

View answer and explanation

Correct option: A

\left[ {1,\mathrm{ }7} \right]

Option A ([1, 7]) is correct because the minimum value of

3\cos(4x-5)

is -3 and the maximum value is 3, so the range of

3\cos(4x-5) + 4

is [1, 7].

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