ok simple

You are capable of doing question 1

so lets move onto question 2

we are given the hypotenuse and another side

since the hypotenuse is the LONGEST side of a triangle, the formula for this will be:

a^2 = c^2 - b^2

we have the lengths 14 and 3

so

x^2 = 14^2 - 3^2

= 196 - 9

= 187

x = sq. root 187

3. You have got it wrong here. Well technically since THE "cosine" rule defines a different rule altogther. Here you are using the cosine RATIO.

so cosine ratio = adj/ hyp

cos 35 = 6/ x

x = cos 35/ 6

4. we are given the opposite and adjacent here. Which means the TAN ratio

therefore:

tan x = 20/ 35

x = tan (inverse, shift + tan) of (20/35)

5. so lets find angle B first

so if we use this angle, we are given the opposite and hypotenuse

which means the SINE ratio

Sin B = 20/ 60

B = Sin (inverse) of 20/60

find that angle

then because theres 180 degrees in a triangle, you can work out the other one

(btw, when you do the inverse operations, find out the fraction first, then press shift + (whatever you need) then equals button)