A piece of string of length 85 cm is divided into three pieces in the ratio 2 : 3 : 5. Calculate the length of the
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Area of the circle is πr² which corresponds to an angle of 360° subtended at the center. Thus, the area of a sector subtending angle at the centre is:
In this case put $\theta$ equal to 30°
<u>Given</u>:
Given that we need to prove the identity
<u>Proof</u>:
Step 1: Factor out the common term sin x, we get;
Step 2: Using the identity
Step 3: Reciprocating sec x, we get;
Step 4: Splitting the denominator, we have;
Simplifying, we get;
Thus, the identity is proved.