Math, asked by jaindersharma21, 6 months ago

1. The value of 4sin2A+4cos2A-1 is_____________

a) 2 b) 3 c) 4​

Answers

Answered by STarAK
31

question

4 sin2A + 4 cos2A - 1

to find value of this

⋆ANSWER☟ 

=> 4 sin2A + 4cos2A - 1

=> 4{ sin2A + cos2A } - 1

=> 4×1 - 1

=> 3 answer

\implies{\rm }

\implies{\rm }\large\bold{\</em><em>o</em><em>p</em><em>t</em><em>i</em><em>o</em><em>n</em><em> </em><em>b</em><em>=</em><em>&gt;</em><em>.</em><em> </em><em> </em><em> </em><em>3</em><em>. </em><em> </em><em> {Verified }}

Answered by naina0529
1

 \huge \mathbb \red{answer :  - }

(b) 3

 \tiny \mathbb \red{step - by - step \:  \:  \: explanation}

4 {sin}^{2} \:   a+ 4 cos^{2} \:  a - 1

 =  &gt; 4( {sin}^{2}  \:  a+  {cos}^{2}  \: a) - 1

 =  &gt; 4 \times 1 - 1

 =  &gt; 3

 \huge \mathbb \red{hence \:  \: proved}

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