Trigonometry sides

• Wiskunde
• Middelbare school
• havo
• Leerjaar 3

Trigonometry

You need your notebook, calculator and Ipad

Today

• Recap last week (15 min)
• Bettermarks (20 min)
• New subject (10 min)
• Bettermarks (20 min)
• End lesson (5 min)

Name the opposite side.

1. KL
2. KM
3. LM

Name the adjacent side
of ∠C

1. AB
2. BC
3. AC

Name the mnemonic you learned last week

Calculate ∠P

Calculate ∠P

$$\cos (\theta )=\frac{a}{h}$$

Calculate ∠P

$$\cos (\angle P)=\frac{6.2}{8.3}$$

$$\cos (\theta )=\frac{a}{h}$$

Calculate ∠P

$$\cos (\angle P)=\frac{6.2}{8.3}$$

$$\angle P={\cos }^{-1}(\frac{6.2}{8.3})$$

$$\cos (\theta )=\frac{a}{h}$$

Calculate ∠P

                        °

$$\cos (\theta )=\frac{a}{h}$$

$$\cos (\angle P)=\frac{6.2}{8.3}$$

$$\angle P={\cos }^{-1}(\frac{6.2}{8.3})$$

$$\angle P\approx 41.67$$

Calculate ∠F
Round your answer to
two decimal places

Calculate ∠F

Exercises

• Homework and equipment check
• 11.4 Soh Cah Toa
• 11:00
• Raise your finger if you have any questions or you're done
• Communicate in English please

11.3 Soh Cah Toa Sides

You need your notebook

Calculate KM

$$\cos (66)=\frac{KM}{19}$$

$$\mathrm{0.406...}=\frac{KM}{19}$$

$$KM=\mathrm{0.406...}\cdot 19$$

$$KM\approx 7.73$$

$$\cos (\theta )=\frac{a}{h}$$

Calculate FG

$$\mathrm{0.74...}=\frac{7}{FG}$$

$$FG=\frac{7}{\mathrm{0.74...}}$$

$$FG\approx 9.42$$

$$\sin (48)=\frac{7}{FG}$$

$$\sin (\theta )=\frac{o}{h}$$

Exercises

• Homework and equipment check
• 11.2 Soh Cah Toa Angels
• 20 minutes
• Raise your finger if you have any questions or you're done
• Communicate in English please

Calculate KM

$$\cos (66)=\frac{KM}{19}$$

$$\mathrm{0.406...}=\frac{KM}{19}$$

$$KM=\mathrm{0.406...}\cdot 19$$

$$KM\approx 7.73$$

$$\cos (\angle K)=\frac{a}{s}$$

Calculate FG

$$\mathrm{0.74...}=\frac{7}{FG}$$

$$FG=\frac{7}{\mathrm{0.74...}}$$

$$FG\approx 9.42$$

$$\sin (48)=\frac{7}{FG}$$

$$\sin (\angle P)=\frac{o}{s}$$