Question

1 + sec A
sin? A
(iv)
sec A
1 - cos A
[संकेत: वाम पक्ष और दाँया पक्ष को अलग-अलग सरल कीजिए।​

Answer 1

Answer:

L.H.S = R.H.S

Step-by-step explanation:

According to this question

Given that,

\frac{1 + sec a}{sec a}

seca

1+seca

= \frac{sin 2a}{1 - cos a}

1−cosa

sin2a

Let, L.H.S

\frac{1 + sec a}{sec a}

seca

1+seca

\frac{1 + (\frac{1}{cos a})}{\frac{1}{cos a}}]

cosa

1

1+(

cosa

1

)

]

\frac{\frac{cos a + 1}{cos a}}{\frac{1}{cos a}}

cosa

1

cosa

cosa+1

cos a + 1cosa+1

Multiple and divide with (1 - cos a)

(1 + cos a)\times \frac{1 - cos a}{1 - cos a}(1+cosa)×

1−cosa

1−cosa

\frac{1 - cos^2 a}{1 - cos a}

1−cosa

1−cos

2

a

\frac{sin 2a}{1 - cos a}

1−cosa

sin2a

R.H.S

Answer 2

Answer:

Fire is a chemical reaction in which energy in the form of heat is produced. When forest fuels burn, there is a chemical combination of the oxygen in the air with woody material, pitch and other burnable elements found in the forest environment. ... The combustion process or �fire� is sometimes called �rapid oxidation.