Question

tan 3/4 find Sina cos a​

Answer 1

Answer:

$sina = \frac{3}{5} \\ \\ cosa = \frac{4}{5}$

Step-by-step explanation:

$tana= \frac{3}{4} = \frac{p}{b} \\ \\ sina = \frac{p}{h} \: \: (1) \\ \\ cosa = \frac{b}{h} \: \: \: (2)$

To find H we have used pythagoras theoram

${h}^{2} = {p}^{2} + {b}^{2} \\ \\ {h}^{2} = {3}^{2} + {4}^{2} \\ \\ {h}^{2} = 9 + 16 \\ \\ {h}^{2} = 25 \\ \\ h = 5$

From equation (1)

$sina = \frac{p}{h} \\ \\ sina = \frac{3}{5}$

From equation (2)

$cosa = \frac{b}{h} \\ \\ cosa = \frac{4}{5}$

Hope it helps uh :)