Q8 of 104 Page 188

If sec θ = find the value of


Let ∠B = θ



⇒ AB = 5k, BC = 13k


⇒ AC = 12k (by Pythagoras theorem)


we know that





⇒


⇒


putting the above values in the given equations.




=


More from this chapter

All 104 →
6

In ΔABC, m∠A = 90 and if AB : BC = 1 : 2 find sinB, cosC, tanC.

 7

If tan θ = , find the value of

9

If sinB = prove that 3cosB – 4cos3B = 0.

 10

If tanA = √3, verify that

(1) sin2A + cos2A = 1


(2) sec2A – tan2A = 1


(3) 1 + cot2A = cosec2A