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9. Values of Trigonometric Functions at Multiples and Submultiple of a
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Q32 of 123 Page 9

Mark the Correct alternative in the following:

The value of is


Given


[using ]


Then







[ using a2 – b2 = (a-b)(a+b)]







[using formula ]


= 3 tan 3x


Therefore


The answer is option A.

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30

Mark the Correct alternative in the following:

The value of cos (36o – A) cos (36o + A) + cos(54o – A) cos (54o + A) is


31

Mark the Correct alternative in the following:

The value of is


33

Mark the Correct alternative in the following:

The value of is


34

Mark the Correct alternative in the following:

is equal to


Questions · 123
9. Values of Trigonometric Functions at Multiples and Submultiple of a
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