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Complete the identity.
-The expression
is to be the left hand side of an equation that is an identity. Which one of the following four expressions can be u: the right hand side of the equation to complete the identity?
Q30: <span class="ql-formula" data-value="\tan \frac { 7 \pi
Q90: x = 3t, y = t +
Q155: <span class="ql-formula" data-value="r = \frac { 5
Q215: <span class="ql-formula" data-value="\cot \gamma"><span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>cot</mi><mo></mo><mi>γ</mi></mrow><annotation
Q256: <span class="ql-formula" data-value="\cos x = \sin x"><span
Q273: <span class="ql-formula" data-value="( 1 - i )
Q342: <span class="ql-formula" data-value="\cos 540 ^ { \circ
Q357: <span class="ql-formula" data-value="f ( x ) =
Q438: <span class="ql-formula" data-value="45 ^ { \circ }
Q467: <span class="ql-formula" data-value="\sin 47.2 ^ { \circ