Class X : HOTS Question Answers: Math Unit - 6 (Trigonometry)

Trigonometry

1.             If xcosθ – ysinθ = a, xsinθ + ycos θ = b, prove that x2+y2=a2+b2.

2.            Prove that sec2θ+cosec2θ can never be less than 2.

8.            If A, B are acute angles and sinA= cosB, then find the value of A+B.