1 / 9

Warm up

Warm up. Find x. Round to the nearest foot. x. x = 25 ft. 100 ft. 51.3 °. 100 ft. 45 °. Lesson 12.1-12.2 Inverse Trig Functions. SWBAT use the inverse of sin, cos and tan to solve for a missing angle in a right triangle.

iola-pratt
Télécharger la présentation

Warm up

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Warm up Find x. Round to the nearest foot. x x = 25 ft 100 ft 51.3° 100 ft 45°

  2. Lesson 12.1-12.2 Inverse Trig Functions SWBAT use the inverse of sin, cos and tan to solve for a missing angle in a right triangle.

  3. It is possible to determine the size of either acute angle in a right triangle if you know the lengths of any 2 sides of that triangle. To do this, you use the inverse function sin -1 cos -1 tan -1 Find them on your calculator – you must push the 2nd button first Trig – Inverse Functions • Anytime you use INVERSE trig you are findingan ANGLE

  4. Let’s look at some examples • Example 1: solve for x To get x alone you do the opposite of tan/sin/cos which is the inverse – tan-1 /sin-1/cos-1 Don’t forget the degree sign

  5. Let’s look at some examples • Example 2: solve for x To get x alone you do the opposite of tan/sin/cos which is the inverse – tan-1 /sin-1/cos-1

  6. Story Problems • Step 1 – Write an equation that represents the trig ratio. • Step 2 – Find the angle that has an approximate tangent value of (8/15) using your calculator (inverse tangent). • When using your calculator, calculate the inverse tan – (2nd, tan, 8/15, enter). Or you can use your trig table sheet, working backwards. (in the tan column look for the value of 8/15 ( . 5333 ), once you find it look back to the angle measure for that value) 8 in (opp) x 15 in ( adj )

  7. Inverse Functions • Ex 4. • Step 1 – • Step 2 - x 18 cm 15 cm

  8. Summary • How are the trig functions we learned about yesterday related to the ones we talked about today? Show how they are related.

  9. Homework • WS 12.1-12.2

More Related