sin x = k

cos x = k

tan x = k

Key points to note

• +R is the maximum value of the expression

• -R is the minimum value of the expression

• the + or - sign in the operation is ONLY to determine which operation in the form is being used

• Recall : Sin (A+B) = Sin A Cos B + Cos A Sin B and Sin (A - B) = Sin A Cos B - Cos A Sin B

• Recall : Cos ( A + B) = Cos A Cos B - Sin A Sin B and Cos ( A - B ) = Cos A Cos B + Sin A Sin B

• Recall : Tan = Sin / Cos

Examples