Question

Find the exact value.

a) 2sin(pi/3) - 3tan(pi/6)
b) 5cos90degrees -8sin270degrees
c)2sin45degrees-4sec45degress
d)tanpi - cos0degrees

Answer 1

Step 1 :

Trigonometric identities :

Step 2 :

(a)

The expression is .

Step 3 :

(b)

The expression is .

Step 4 :

(c)

The expression is .

Step 5 :

(d)

The expression is .

Solution :

(a)

(b) 

(c)

(d)