Please provide the answer as soon as possible With explanation - Physics - Basic Mathematics(Pre-requisite)

Question

Please provide the answer as soon as possible With explanation

Sanat K Mukherjee · Accepted Answer

Dear Student,
Both sinθ and cosθ are positive in the range (0o to 180o), i
e
 1st Quadrantand Both sinθ and cosθ are negative in the range (180o to 270o), i
e
 3rd QuadrantIn the 2nd quadrant, sinθ is +ve and cosθ is -ve
 In the 4th quadrant, sinθ is -ve and cosθ is +ve
 So,for tha range 180o <θ< 360o, among the angles provided, 225o lies in the 3rd quadrant and can be expressed as (180o+45o)sin225o=sin180o+45o=sin45o=12cos225o=cos180o+45o=cos45o=12Ans (3)

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Please provide the answer as soon as possible. With explanation