Question

Calculate the answer without using a calculator
g) cos 180° + 2 fan 30 sin 60​

Answer 1

0

Explanation:

Tan 30 and Sin 60 are in first quadrant and so their values will be positive.

Cos 180 is in Second quadrant. In second quadrant , value of cos is negative.

Cos 180 = -1 ; Tan 30 = 1/√3 & Sin 60 = √3/2.

Cos 180 + 2 tan 30 + Sin 60 =
`-1 + 2* (1)/(√(3))*(√(3))/(2)`

=
`-1 + 1 = 0`