ICSE Class 9 Maths Complementary Angle Relations

Q.

Which of the following values is not defined? 



Q.

Find the value of   



Q.

If cos3A = sin (2A + 30˚) where 3A is an acute angle, then find the value of A. 



Q.

Find the value of   



Discuss concept of complementary angles in right angled triangle. Trigonometric ratios of complementary angles