(a) Write 3cos? + 4sin? in the form Rcos(? – ?), and hence solve the equation 3cos? + 4sin? = 2 [9 marks]

(b) The following frequency table gives the heights to the nearest centimetre of 100 school boys.

Height (cm) 152 153 154 155 156 157 158 159 160 161
Number of boys 1 2 3 4 6 8 16 23 14 11

162 163 164 165 Total
6 4 1 1 100

Find:

(i) The mode. [2 marks]
(ii) The mean. [2 marks]
(iii) The median. [3 marks]
(iv) The standard deviation. [4 marks

 

 

 

 

 

 

 

For a custom-written paper on the above topic, place your order now!

What We Offer
• On-time delivery guarantee
• PhD-level professionals
• Automatic plagiarism check
• 100% money-back guarantee
• 100% Privacy and Confidentiality
• High Quality custom-written papers

Found something interesting ?

• On-time delivery guarantee
• PhD-level professional writers
• Free Plagiarism Report

• 100% money-back guarantee
• Absolute Privacy & Confidentiality
• High Quality custom-written papers

Grab your Discount!

25% Coupon Code: SAVE25
get 25% !!