Question Simplify the expression 30tsec(c) Evaluate sec(−c)×30tUse sec(−t)=−sec(t) to transform the expression sec(c)×30tMultiply the terms 30sec(c)×tCalculate 30×cos(c)1×tCalculate cos(c)30tRewrite the expression 30tcos−1(c)Solution 30tsec(c) Show Solution