Question

Calculate the formula unit mass of CaCO3 and Al2(SO4)3
( Atomic mass of C – 12u, O – 16u, H – 1u, S – 32u, Ca – 40u, Al – 27u )

Answer 1

If we write opposite of the value of Sin degrees, we get the values of cos degrees. Because, Sin

θ

θ=1/Cos

θ

θ

Therefore we can write,

Sin 00= Cos 900=0

Sin 300=Cos 600=½

Sin 450=Cos 450 =

1

/

√

2

1/2

Sin 600=Cos 300=

√

3

/

2

3/2

Sin 900=Cos 00=1

In the same way, we can write the values for Tan degrees.

Tan

θ

θ=Sin

θ

θ/Cos

θ

θ

Therefore,

Tan 00=Sin 00/Cos 00=0

Tan 300=Sin 300/Cos 300=

√

3

3/2

Tan 450=Sin 450/Cos 450=1

Tan 600=Sin 600/Cos 600=

√

3

3

Tan 900=Sin 900/Cos 900=Undefined