Question

plz give me the answers to the picture​

Answer 1

Answer:

1 = (c) 1

2= (b) √3/2

3 = 1/√2 + 1/2

= 2√2 + 1

2

4= P=3

B=4

H=5

cos A = 4

5

Answer 2

i) C} 1

ii) B} $\frac{\sqrt{3} }{2}$

SOLVE:

1}

$cos^{2} 45 + sin^{2} 30 \\\\(\frac{1}{\sqrt{2}})^2 + (\frac{1}{2})^{2} \\\\\frac{1}{2} +\frac{1}{4} \\\\\frac{2+1}{4}= \frac{3}{4}$

2}

$H^{2}= A^{2} +O^{2}\\\\A^{2}= H^{2}- O^{2} \\\\A^{2}= 5^{2}- 3^{2} \\\\A^{2}= 25-9\\\\A^{2}= 16\\\\A = 4$

$sin A = \frac{3}{5 } \\\\cosA = \frac{4}{5}$