Question

`(cos^2 30^circ cos^2 45^circ + 4 sec^2 60^circ + 1/2 cos^2 90^circ - 2 tan^2 60^circ)` = ?

पर्याय

• `81/8`

• `83/8`

• `73/8`

• `75/8`

Answer 1

`bb(83/8)`

Explanation:

Given expression = `{(sqrt(3)/2)^2 xx (1/sqrt(2))^2 + (4 xx 2^2) + (1/2 xx 0^2) - 2 xx (sqrt(3))^2}`

= `{(3/4 xx 1/2) + 16 + 0 - 6}`

= `(3/8 + 10)`

= `83/8`