Question

Pls ans very important free points 20 points your mind do it

Answer 1

Answer:

Step-by-step explanation:

1) cot theta = 3/4

base/perpendicular=3/4

base=3

perpendicular=4

and hypotenuse is 5

sin theta=p/h=4/5

cos theta=b/h=3/5

tan theta=p/b=4/3

cosec theta=5/4

sec theta =5/3

2)cosec=17/8=h/p

p=8

b=15

h=17

sin=8/17

cos=15/17

tan=8/15

sec=17/15

cot=15/8

3)sec=13/12=h/b

p=5

b=12

h=13

sin=5/13

cos=12/13

tan=5/13

cosec=13/5

cot=13/5

5) cosec=17/8=h/p

p=8

b=15

h=17

(1) 2000/2067

(2) 16

Answer 2

Answer:

y=a sinπ(

2

t

−

4

x

)

Compare this with standard equation, y=A sin 2π(

T

t

−

λ

x

)

where, A= amplitude

λ= wavelength = 4

T= time period = 2

T

1

=

2

1

=0.5

f= frequency

f=

T

1

=0.5

f= 0.5 Hz

Wave velocity, v=f×λ

v=0.5×4=2cm/s