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Related Questions:
What is radians in degrees?
Find (1 - cos² θ)(cot²θ + 1) - 1.
Express sin θ in terms of cot θ, where θ is an acute angle.
P and Q are the mid points of AB and AC respectively. R is a point on BC. Area of triangle PBR is 12 square centimeters and that of triangle QRC is 18 square centimeters what is the area of triangle PQR ?