If 2 cos A = 2/5 , find the value of 4 + 4 tan²A
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2cos A=2/5
cosa=1/5
sin^2A=1-cos^2A
=1-1/25
24/25. 4+4sin^2A/cos^2A
4+4(24/25×5)
4+4×24/5=116/5=23.2
cosa=1/5
sin^2A=1-cos^2A
=1-1/25
24/25. 4+4sin^2A/cos^2A
4+4(24/25×5)
4+4×24/5=116/5=23.2
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