Math, asked by s21039bduvvuru00939, 14 hours ago

if 4tana=3 then (cos²a –sin²a) =​

Answers

Answered by debanshubhattacharyy
1

Answer:

7/25 is the ANSWER

Step-by-step explanation:

here

4tan A=3

or,tan A=3/4

or,sin A/cos A=3/4

or,sin²A/cos²A=9/16

or,cos²A/sin²A=16/9

or,cos²A+sin²A / cos²A-sin²A=16+9 / 16-9

or,1/ cos²A-sin²A=25/7

or,cos²A-sin²A=7/25

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