if cosA=2/5,find the value of 4+4tan2 A
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Is the answer 68-16(21^(1/2))/17 ?
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cos A =2/5 = b/h
p²= h²-b²
=> p²=25-4
=21
=>p²=√21
tanA= p/b=√21/2
4+4tan2A=4+4(√21/2)²
=> 4+4(21/4)
=> 4+21
Hence, Its answer is 25.
p²= h²-b²
=> p²=25-4
=21
=>p²=√21
tanA= p/b=√21/2
4+4tan2A=4+4(√21/2)²
=> 4+4(21/4)
=> 4+21
Hence, Its answer is 25.
In the question it is Tan2A , not (Tan A)^2
yes i done by tan²A
yes both r right
okk
tq very much bro
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