if 4tana=3 then (cos²a –sin²a) =
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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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