Question 1: Find the values of the following trigonometric ratios:

Answer:

for all

[Note: ]

Question 2: Prove that:

Answer:

RHS.

Question 3: Prove that:

Answer:

RHS

Answer:

Question 5: Prove that:

Answer:

Question 6: In a , prove that:

Answer:

Hence proved.

Hence proved.

Question 7: If A, B, C, D be the angles of a cyclic quadrilateral, taken in order, prove that:

Answer:

Given

Question 8: Find from the following equations:

Answer:

Question 9: Prove that:

Answer: