Finding a side using trig ratios S O

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Finding a side using trig ratios S O H Some Old Hags C A

Finding a side using trig ratios S O H Some Old Hags C A H T O A Can’t Always Hide Their Old Age Steps to solving a trig question: 1. Draw a diagram (or copy the diagram) 2. Label sides H, O and A. 3. Identify which trig ratio you need to use. 4. Form an equation 5. Solve the equation 6. Answer the question

Finding a side using trig ratios S O H Some Old Hags C A

Finding a side using trig ratios S O H Some Old Hags C A H Can’t Always Hide Examples 1) Find the value of q correct to 1 DP. A 11 mm q O H tan 32° = q/11 tan q = 11 tan 32° q = 6 9 mm 32° T O A Their Old Age Steps 1. Draw diagram 2. Label sides 3. Identify trig ratio. 4. Form an equation 5. Solve the equation 6. Answer the question

Finding a side using trig ratios S O H C A H T O

Finding a side using trig ratios S O H C A H T O A Some Old Hags Can’t Always Hide Their Old Age Examples Steps 2) Elise runs across the Olympic stadium at an 1. Draw diagram angle of 24° 12’ to the 100 m track. If she finishes 2. Label sides 21 m from the 100 m track, how far has she run? 3. Identify trig ratio. 4. Form an equation O 21 m 5. Solve 6. Answer 24° 12’ A d H sin 24° 12’ = 21/d d = 21/sin 24° 12’ d = 51 2 m Elise runs 51 2 m. Swap the d and sin 24° 12’.

Finding an angle using trig ratios S O H Some Old Hags C A

Finding an angle using trig ratios S O H Some Old Hags C A H Can’t Always Hide Examples 1) Find the value of θ correct to minute. A 21 mm θ 14 mm O H tanθ = 14/21 shift tan 14 ab/c 21 ° ’ ” θ = 33° 41’ T O A Their Old Age Steps 1. Draw diagram 2. Label sides 3. Identify trig ratio. 4. Form an equation 5. Solve the equation 6. Answer the question

Finding an angle using trig ratios S O H Some Old Hags C A

Finding an angle using trig ratios S O H Some Old Hags C A H Can’t Always Hide Examples 2) 24 cm 15 cm H O θ A sin θ = 15/24 shift sin 15 ab/c 24 ° ’ ” θ = 38° 41’ T O A Their Old Age Steps 1. Draw diagram 2. Label sides 3. Identify trig ratio. 4. Form an equation 5. Solve the equation 6. Answer the question

Finding an angle using trig ratios S O H Some Old Hags Examples 3)

Finding an angle using trig ratios S O H Some Old Hags Examples 3) θ A C A H Can’t Always Hide H 45 km 53 km O cosθ = 45/53 shift cos 45 ab/c 53 ° ’ ” θ = 31° 53’ T O A Their Old Age Steps 1. Draw diagram 2. Label sides 3. Identify trig ratio. 4. Form an equation 5. Solve the equation 6. Answer the question

Today’s work Exercise 7: 08 Page 275 → 277 Q 3, 4, 5 a,

Today’s work Exercise 7: 08 Page 275 → 277 Q 3, 4, 5 a, c, e. . . Q 7, 9, 11, 12, 13, 16 & 18 Yesterday’s work Exercise 7: 06 Page 267 → 269 Q 4, 6 ALL Q 8 → 13 ALL Exercise 7: 07 Page 272 → 273 Q 4, 6 ALL Q 8 → 13 ALL