Question

Find the values of the following expression 15 cos? 0° +3 sin2 90° - 8 cos2 60° +9 sec 30° 2 cot 45° - 3 tan2 60° +5 cos 0°​

Answer 1

Answer:

5sin30

∘

+3tan45

∘

we know

sin30=

2

1

and tan45=1

⇒5×

2

1

+3×1=

2

5

+3

⇒

2

5+6

=

2

11

.