We have that <span>tan(theta)sin(theta)+cos(theta)=sec(theta) </span><span>[sin(theta)/cos(theta)] sin(theta)+cos(theta)=sec(theta) </span>[sin²<span>(theta)/cos(theta)]+cos(theta)=sec(theta)
</span><span>the next step in this proof is </span>write cos(theta)=cos²<span>(theta)/cos(theta) to find a common denominator so
remember that </span>sin²(theta)+cos²(theta)=1 {[sin²(theta)+cos²(theta)]/cos(theta)}------------> 1/cos(theta) and 1/cos(theta)=sec(theta)-------------> is ok
the answer is the option <span>B.) He should write cos(theta)=cos^2(theta)/cos(theta) to find a common denominator.</span>
The volume of the rectangular prism is equal to length times width times height. Since length and width are equal, the formula includes the squaring of the length. after substitution, the formula is 9^2 * 5 equal to 405 m^3.
