Class 11 Mathematics Trigonometric Functions Trigonometrical ratios of multiple and sub-multiple angles

Medium

If $\cosh(x) = \frac{5}{4}$,then $\cosh(3x)$ is equal to

AP EAMCET 2016 All AP EAMCET

A
$\frac{61}{16}$
B
$\frac{63}{16}$
C
$\frac{65}{16}$
D
$\frac{61}{63}$

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Class 11 Questions

Class 11

Mathematics Questions

Chapter

Trigonometric Functions

Subtopic

Trigonometrical ratios of multiple and sub-multiple angles

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