Question

if sina = cosa then find the value of
2 tana + cos2a​

Answer 1

Answer:

sin=Height/Hypotenuse

cos =Base/Hypotenuse

these are the formulas which will help for sums

Answer 2

Answer:

$\sin( \alpha ) \: = \cos( \beta ) \\ we \: know \: that \: \sin(45) = \cos(45) \\ so \: \: a = 45 \\ 2 \tan( \alpha ) + { \cos( \alpha) }^{2} = 2 \tan(45) + {cos}^{2} 45 \\ 2 \times 1 + \frac{1}{\sqrt{ {2}^{2} } } = 2 + \frac{1}{2} = 4 + \frac{1}{2} = \frac{5}{2}$