Question

pls answer questions 3 and 5

Answer 1

No idea for 5th question.

Answer 2

3.
Sin A= 3/4
Sin= opp/Hyp
opp= 3& Hyp= 4

From Pythagoras theorem,
hyp²= opp² + adj²
=> adj²= hyp² - opp²
=> adj²= 16-9
adj= √7



• Cos= adj/hyp
Cos A= √7/4

• tan= opp/adj
tan A= 3/√7



5. sec a= 13/12

•sec = 1/cos
=> cos a = 12/13

•cos= adj/hyp
adj= 12& hyp= 13

From Pythagoras theorem,
hyp²= opp² + adj²

opp²= hyp² - adj²
=> opp²= 169 - 144=25
=> opp= √25= 5

•sin= opp/hyp
sin a = 5/13

•cosec= 1/sin
cosec a = 13/5

•tan= sin/cos
tan a = (5/13)/(12/13)
tan a =5/12

•cot= 1/tan
cot a= 12/5

;)
hope it helps