Question

secA=m+n/2√mn,A is acute,find sinA
A)m+n/m-n
B)m/m+n
C)m-n/m+n
D)n/m+n​

Answer 1

Answer:

Find the lateral surface area and total surface area of a cuboid of length 80 cm, breadth 40 cm and height 20 cm.

ANSWER

l=80cm,b=40cm,h=20cm

Therefore,

TSA = 2(lb+bh+hl)

=2(80×40+40×20+80×20)=11200 cm²

LSA = 2(l+b)h=2(80+40)20=4800 cm²

I hope this will be help you.

Answer 2

Answer:

Step-by-step explanation:

secA=m+n/2√mn,A is acute,find sinA

A)m+n/m-n

B)m/m+n

C)m-n/m+n

D)n/m+n​