Sec tita - 1/sec tita +1 = sin square tita/ (1+cos tita) whole square

Proof is in the explanation.

Step-by-step explanation:

I figure out what you were saying:

I'm going to try to rewrite left hand side as right hand side.

I'm going to rewrite :

Multiply both numerator and denominator by :

Multiply both numerator and denominator by :

When multiplying conjugates you only have to do first time first and last times last:

We can rewrite the numerator using the Pythagorean Identity: .

This gives us:

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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