No, the correct identity is

. It is obtained by dividing the both sides of the Pythagorean Trigonometric Identity by cos²(x):
Mario made the mistake on everything and he needs help
The answer is 3.75.
Since the length of 'b' is one-half that of 7.5 based on the diagram (we know this because the partial radii connecting the two lines, or chords, are the same length, meaning the two chords are equal);
<u>7.5</u> ⇒ 3.75<u>
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</u><em>Hope that helps.</em><u>
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This is example of what you can do 13-5×=3. -5×=3-13. -5×÷-5=-10÷-5=2. you have to group like times to find ×, then divide both sides with the number that has variable at the side