Hi , can anyone help please? 7) Given triangle ABC alongside
a) Determine an expression for Angle A in terms of B and C
the answer here is A = 180° - B - C

I'm just not sure how to answer b!
b) Hence, prove that cos A = sin B sin C - cos B cos C ​

i really dont know

step-by-step explanation:

the answer to your question a or b but i am pretty sure it is b. i hope this : )

step-by-step explanation:

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

he will have 300 because he is really broke and 300 is in his imangine

step-by-step explanation: he ehe heh step by the thy