Use your calculator to find : cos π 2

Given that, the trigonometric function is cos π 2 Since, the given angle is in radians, select "rad" on the calculator. Now, select cos on the calculator Enter the value of the radians that is π 2 radians The above step can be vice versa for some of the calculators, that is enter the value of the angle first and then select the trigonometric function. and then enter = on the calculator Thus the value of cos π 2 is 0 .

Use your calculator to find : sin π 3

Given that, the trigonometric function is sin π 3 Since, the given angle is in radians, select "rad" on the calculator. Now, select sin on the calculator Enter the value of the radians that is π 3 radians The above step can be vice versa for some of the calculators, that is enter the value of the angle first and then select the trigonometric function. and then enter = on the calculator Thus the value of sin π 3 is 0 . 866 .

Use your calculator to find : tan π 5

Given that, the trigonometric function is tan π 5 Since, the given angle is in radians, select "rad" on the calculator. Now, select tan on the calculator Enter the value of the radians that is π 5 radians The above step can be vice versa for some of the calculators, that is enter the value of the angle first and then select the trigonometric function. and then enter = on the calculator Thus the value of tan π 5 is 0 . 726 .

E M B I B E

Cambridge International AS & A Level Mathematics : Pure Mathematics 1 Course Book>Chapter 4 - Circular Measure>EXERCISE 4A

Sue Pemberton Solutions for Chapter: Circular Measure, Exercise 1: EXERCISE 4A

Author:Sue Pemberton

Sue Pemberton Mathematics Solutions for Exercise - Sue Pemberton Solutions for Chapter: Circular Measure, Exercise 1: EXERCISE 4A

Attempt the practice questions on Chapter 4: Circular Measure, Exercise 1: EXERCISE 4A with hints and solutions to strengthen your understanding. Cambridge International AS & A Level Mathematics : Pure Mathematics 1 Course Book solutions are prepared by Experienced Embibe Experts.

Questions from Sue Pemberton Solutions for Chapter: Circular Measure, Exercise 1: EXERCISE 4A with Hints & Solutions

EASY

AS and A Level

IMPORTANT

Cambridge International AS & A Level Mathematics : Pure Mathematics 1 Course Book>Chapter 4 - Circular Measure>EXERCISE 4A>Q 6

Use your calculator to find : $\sin (0.7)$

EASY

AS and A Level

IMPORTANT

Cambridge International AS & A Level Mathematics : Pure Mathematics 1 Course Book>Chapter 4 - Circular Measure>EXERCISE 4A>Q 6

Use your calculator to find : $\tan (1.5)$

EASY

AS and A Level

IMPORTANT

Cambridge International AS & A Level Mathematics : Pure Mathematics 1 Course Book>Chapter 4 - Circular Measure>EXERCISE 4A>Q 6

Use your calculator to find : $\cos (0.9)$

EASY

AS and A Level

IMPORTANT

Cambridge International AS & A Level Mathematics : Pure Mathematics 1 Course Book>Chapter 4 - Circular Measure>EXERCISE 4A>Q 6

Use your calculator to find : $\cos \frac{π}{2}$

EASY

AS and A Level

IMPORTANT

Cambridge International AS & A Level Mathematics : Pure Mathematics 1 Course Book>Chapter 4 - Circular Measure>EXERCISE 4A>Q 6

Use your calculator to find : $\sin \frac{π}{3}$

EASY

AS and A Level

IMPORTANT

Cambridge International AS & A Level Mathematics : Pure Mathematics 1 Course Book>Chapter 4 - Circular Measure>EXERCISE 4A>Q 6

Use your calculator to find : $\tan \frac{π}{5}$

EASY

AS and A Level

IMPORTANT

Cambridge International AS & A Level Mathematics : Pure Mathematics 1 Course Book>Chapter 4 - Circular Measure>EXERCISE 4A>Q 7

Calculate the length of $Q R$

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EASY

AS and A Level

IMPORTANT

Cambridge International AS & A Level Mathematics : Pure Mathematics 1 Course Book>Chapter 4 - Circular Measure>EXERCISE 4A>Q 8

Robert is told the size of angle $BAC$ in degrees and he is then asked to calculate the length of the line $BC$ . He uses his calculator but forgets that his calculator is in radian mode. Luckily he still manages to obtain the correct answer. Given that angle $BAC$ is between $10 °$ and $15 °$ , Draw the graph to find the size of angle $BAC$ , correct to $2$ decimal places.

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