Evaluate $\sin82^\circ$sin82° to two decimal places.
Evaluate $\cos28^\circ$cos28° to two decimal places.
Evaluate $\tan84^\circ$tan84° to two decimal places.
Evaluate $9\sin63^\circ$9sin63° to two decimal places.
recognise the constancy of the sine, cosine and tangent ratios for a given angle in right-angled triangles using properties of similarity