1 . Rewrite as a single trig function, then evaluate: 18sin157.5∘cos157.5∘ 2. Use a half angle identity to evaluate.

tan(3π8)

3. Use a sum or difference identity to evaluate.

sin15∘

4. Given: cotA=−247 , where cosA>0 and

cosB=35 where 0

Evaluate:

a) cos2A

b) sinB2

96 39 cause 135 -96=39 im smart (i used a calculater)

given : the shape of his satellite can be modeled by   where x and y are modeled in inches.

now,the given equation   is a equation of parabola.

here, coefficient of x is positive, hence the parabola opens rightwards.

on comparing this equation with standard equation , we get

in standard equation, coordinates of focus=(0,m)

thus for given equation coordinates of focus=(0,1.5)

step-by-step explanation: